CN104807949A - Determination method for total sulfur in water quality - Google Patents
Determination method for total sulfur in water quality Download PDFInfo
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- CN104807949A CN104807949A CN201510263305.6A CN201510263305A CN104807949A CN 104807949 A CN104807949 A CN 104807949A CN 201510263305 A CN201510263305 A CN 201510263305A CN 104807949 A CN104807949 A CN 104807949A
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- Prior art keywords
- sulfur
- water
- water quality
- total sulfur
- water sample
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 98
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 239000011593 sulfur Substances 0.000 title claims abstract description 64
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 23
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000292 calcium oxide Substances 0.000 claims abstract description 13
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 13
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 10
- QFFVPLLCYGOFPU-UHFFFAOYSA-N barium chromate Chemical compound [Ba+2].[O-][Cr]([O-])(=O)=O QFFVPLLCYGOFPU-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229940083898 barium chromate Drugs 0.000 claims abstract description 10
- 238000002798 spectrophotometry method Methods 0.000 claims abstract description 10
- 239000012286 potassium permanganate Substances 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims description 23
- 238000003556 assay Methods 0.000 claims description 15
- 239000012153 distilled water Substances 0.000 claims description 12
- 239000013589 supplement Substances 0.000 claims description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000006228 supernatant Substances 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 5
- 244000178870 Lavandula angustifolia Species 0.000 claims description 3
- 235000010663 Lavandula angustifolia Nutrition 0.000 claims description 3
- 238000009835 boiling Methods 0.000 claims description 3
- 238000007865 diluting Methods 0.000 claims description 3
- 230000008034 disappearance Effects 0.000 claims description 3
- 239000001102 lavandula vera Substances 0.000 claims description 3
- 235000018219 lavender Nutrition 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000004513 sizing Methods 0.000 claims description 3
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 3
- -1 sulfide ions Chemical class 0.000 abstract description 14
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 229910017604 nitric acid Inorganic materials 0.000 abstract description 4
- 235000013305 food Nutrition 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract 4
- 238000007254 oxidation reaction Methods 0.000 abstract 4
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 239000000523 sample Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 16
- 239000005864 Sulphur Substances 0.000 description 11
- 238000011084 recovery Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 3
- 235000005979 Citrus limon Nutrition 0.000 description 2
- 244000131522 Citrus pyriformis Species 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 210000003608 fece Anatomy 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- DHCDFWKWKRSZHF-UHFFFAOYSA-L thiosulfate(2-) Chemical compound [O-]S([S-])(=O)=O DHCDFWKWKRSZHF-UHFFFAOYSA-L 0.000 description 1
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- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The invention discloses a determination method for total sulfur in water quality. The method includes the following four steps: while sulfurous gas which can leak out is fixed by calcium oxide, potassium permanganate oxidation, nitric acid oxidation, hydrochloric acid regulation and barium chromate spectrophotometry are used for determining sulfate radical, which is converted into sulfur content. During total sulfur determination in water sample, calcium oxide and potassium permanganate are first added to oxidate sulfide ions under alkaline condition, sulfur in other valence states is then oxidated or decomposed into the sulfate radical under the joint oxidation of potassium permanganate and nitric acid, hydrochloric acid solution is then added to regulate the water sample and remove the color of the potassium permanganate, finally, the sulfate radical content in water quality is determined by barium chromate spectrophotometry, and total sulfur content is worked out. According to the characteristics of the sulfur in different valence states in water quality, by fixation, oxidation and decomposition, the method finally converts the sulfur in all valence states into the sulfate radical, and utilizes barium chromate spectrophotometry to determine the sulfate radical, and thereby the total sulfur in water quality is determined. Determination is simple, the result is accurate, and the method can be applied in fields such as environment protection and monitoring, food monitoring and sulfur balance analysis.
Description
Technical field
The present invention relates to the assay method of total sulfur in the field water quality such as environmental impact assessment, environmental protection, research and application, food, particularly the assay method of total sulfur in a kind of environment monitoring water quality.
Background technology
In surroundings observation process; thiosulfate anion, sulfide, sulfate radical etc. are had in the detection method of the sulphur in water quality; but do not relate to the detection of some other forms of sulphur, to persulfate, the mensuration of the valence state of some sulphur such as sulphite is not easy to.When doing material balance, the balance of sulphur is difficult to do; In environmental issue, in water quality, sulphur is converted into gaseous state and solid-state concrete value is difficult to determine.Therefore, the assay method of total sulfur in a kind of water quality is invented to MaterialBalance Computation, to environmental monitoring, all there is important meaning to food etc.
Summary of the invention
The object of patent of the present invention is exactly the problems referred to above existed for sulphur monitoring, provides the assay method of total sulfur in a kind of water quality.Patent of the present invention is according to the heterogeneity of the sulphur of different valence state, with the sulphur of potassium permanganate and the common oxidizing lower state of nitric acid, and add calcium oxide simultaneously issuable gaseous sulfur is fixed as precipitate morphology, finally be converted into sulfate radical form, add hydrochloric acid heating again and boil several tens minutes, then adopt the sulfate in Barium Chromate Spectrophotometry mensuration water quality.
Step of the present invention is as follows:
(1), appropriate water sample is got, adding distil water is to 50mL, in water sample, add calcium oxide to size mixing supernatant, add liquor potassic permanganate, be alkalescence with sodium hydrate regulator solution pH to solution, heat on electric hot plate, keep micro-heating 15min that boils, if a small amount of potassium permanganate maintenance lavender is added in purple disappearance in heating process;
(2), with distilled water supplement volume of water sample, in water sample, add salpeter solution, keep slight boiling condition heating 10min;
(3), with distilled water supplement volume of water sample, in water sample, add hydrochloric acid solution heating 5min;
(4), take off after to measure sulfate radical in water sample according to Barium Chromate Spectrophotometry, be scaled sulfur content.
In described step (1), when in water quality during sulfur-bearing height, get suitable water sample after can diluting, institute's water sampling sulfur-bearing is not more than 3.3mg.
In described step (1), add calcium oxide supernatant liquid measure of sizing mixing and be not more than 0.8mL, otherwise the calcium oxide needing to do respective volume is omnidistance blank; The liquor potassic permanganate added is the liquor potassic permanganate of mass percent concentration 0.4%, and once adding volume can not be too large, otherwise affects colorimetric; PH scope is regulated to be 7.5 ~ 9.
In described step (2), supplement volume of water sample to about 50mL with distilled water; The salpeter solution added is red fuming nitric acid (RFNA), and volume is 0.5 ~ 2mL; Keep micro-heating 15min that boils, if there is not brown flocculent deposit, can the proper extension heat time.
In described step (3), supplement volume of water sample to about 50mL with distilled water; The hydrochloric acid solution added in water sample is concentration is that 2.5moL/L dilute hydrochloric acid solution is about the micro-heating 5min that boils of 1mL, if brown layering is not fine, and can the proper extension heat time.
In described step (4), sulfate radical in chromate water by Spectrophotometry matter, concrete operation step is for adding the micro-heating 5min that boils of barium chromate suspension, taking off rear ammoniacal liquor, to be adjusted to solution be lemon yellow, many droppings 1 to 2, use Filter paper filtering constant volume at a slow speed in 50mL volumetric flask, to measure absorbance with under 420nm wavelength, contrast with typical curve, calculate sulfur content.
Beneficial effect of the present invention:
The present invention is according to the heterogeneity of sulfocompound in water, with the sulphur of potassium permanganate and the common oxidizing lower state of nitric acid, and add calcium oxide simultaneously issuable gaseous sulfur is fixed as precipitate morphology, and utilized the sulphur heating of high-valence state easily to decompose, finally be converted into sulfate radical form, add hydrochloric acid heating again and boil several tens minutes, then adopt the sulfate in Barium Chromate Spectrophotometry mensuration water quality.
Embodiment
The present invention includes following steps:
(1) (institute's water sampling sulfur-bearing is not more than 3.3mg to get appropriate water sample, suitable water sample is got) after water sample sulfur-bearing height can dilute, adding distil water is to 50mL, in water sample, add calcium oxide to size mixing supernatant, add liquor potassic permanganate, be alkalescence with sodium hydrate regulator solution pH to solution, heat on electric hot plate, keep micro-heating 15min that boils, if a small amount of potassium permanganate maintenance lavender is added in purple disappearance in heating process.
(2) supplement volume of water sample with distilled water, in water sample, add salpeter solution, keep slight boiling condition heating 10min;
(3) supplement volume of water sample with distilled water, in water sample, add hydrochloric acid solution heating 5min.
(4) measure the sulfate radical in water sample according to Barium Chromate Spectrophotometry after taking off, be scaled sulfur content.
In described step (1), when in water quality during sulfur content height, get suitable water sample after can diluting, institute's water sampling sulfur-bearing is not more than 3.3mg.
In described step (1), add calcium oxide supernatant liquid measure of sizing mixing and be not more than 0.8mL, otherwise the calcium oxide needing to do respective volume is omnidistance blank; The liquor potassic permanganate added is the liquor potassic permanganate of mass percent concentration 0.4%, and once adding volume can not be too large, otherwise affects colorimetric; PH scope is regulated to be 7.5 ~ 9.
In described step (2), supplement volume of water sample to about 50mL with distilled water; The salpeter solution added is red fuming nitric acid (RFNA), and volume is 0.5 ~ 2mL; Keep micro-heating 15min that boils, if there is not brown flocculent deposit, can the proper extension heat time.
In described step (3), supplement volume of water sample to about 50mL with distilled water; The hydrochloric acid solution added in water sample is concentration is that 2.5moL/L dilute hydrochloric acid solution is about the micro-heating 5min that boils of 1mL, if brown layering is not fine, and can the proper extension heat time.
In described step (4), sulfate radical in chromate water by Spectrophotometry matter, concrete operation step is for adding the micro-heating 5min that boils of barium chromate suspension, taking off rear ammoniacal liquor, to be adjusted to solution be lemon yellow, many droppings 1 to 2, use Filter paper filtering constant volume at a slow speed in 50mL volumetric flask, to measure absorbance with under 420nm wavelength, contrast with typical curve, calculate sulfur content.
Instantiation 1:
The sulfur-bearing water sample that a kind of sulfur speciation of configuration sulf onyl compound exists, sulfide sulfur-bearing 1mg/mL, gets 2mL water sample and measures according to the method described above, measures sulfate radical result is 6.24mg, and being scaled sulfur content is 2.08mg, and sulfur recovery rate is 104%;
Instantiation 2:
The sulfur-bearing water sample that a kind of sulfur speciation of configuration sulf onyl thiosulfate exists, water sample sulfur-bearing 1mg/mL, gets 2mL water sample and measures according to the method described above, measures sulfate radical result is 6.04mg, and being scaled sulfur content is 2.01mg, and sulfur recovery rate is 101%;
Instantiation 3:
Configuration is only containing the sulfur-bearing water sample that a kind of sulfur speciation of sulphite exists, and water sample sulfur-bearing 1mg/mL, gets 2mL water sample and measure according to the method described above, measures sulfate radical result is 5.84mg, and being scaled sulfur content is 1.95mg, and sulfur recovery rate is 97.5%;
Instantiation 4:
Configuration is only containing the sulfur-bearing water sample that a kind of sulfur speciation of persulfate exists, water sample sulfur-bearing 1mg/mL, gets 2mL water sample and measure according to the method described above, measures sulfate radical result is 6.34mg, and being scaled sulfur content is 2.12mg, and sulfur recovery is 106%;
Instantiation 5:
Configuration is containing the sulfur-bearing water sample of multiple pricing sulphur: get respectively the sulfur compound of above-mentioned configuration, thiosulfate, sulphite, persulfate an aqueous solution 0.5mL, then sampling amount sulfur-bearing total amount is 2mg.Measure according to the method described above, measure sulfate radical result is 6.15mg, being scaled sulfur content is 2.05mg, and sulfur recovery is 103%.
Claims (10)
1. the assay method of total sulfur in water quality, the step of the method is as follows:
(1) appropriate water sample adding distil water, is got to 50mL, in water sample, add calcium oxide to size mixing supernatant, add liquor potassic permanganate, be alkalescence with sodium hydrate regulator solution pH to solution, heat on electric hot plate, keep micro-heating 15min that boils, if a small amount of potassium permanganate maintenance lavender is added in purple disappearance in heating process;
(2), with distilled water supplement volume of water sample, in water sample, add salpeter solution, keep slight boiling condition heating 10min;
(3), with distilled water supplement volume of water sample, in water sample, add hydrochloric acid solution heating 5min;
(4), take off after to measure sulfate radical in water sample according to Barium Chromate Spectrophotometry, be scaled sulfur content.
2. the assay method of total sulfur in a kind of water quality according to claim 1, is characterized in that: in described step (1), adds calcium oxide supernatant liquid measure of sizing mixing and is not more than 0.8mL, otherwise the calcium oxide needing to do respective volume is omnidistance blank.
3. the assay method of total sulfur in a kind of water quality according to claim 1, it is characterized in that: in described step (1), the liquor potassic permanganate added is the liquor potassic permanganate of mass percent concentration 0.4%.
4. the assay method of total sulfur in a kind of water quality according to claim 1, is characterized in that: in described step (1), regulates pH scope to be 7.5 ~ 9.
5. the assay method of total sulfur in a kind of water quality according to claim 1, is characterized in that: in described step (2), supplement volume of water sample to about 50mL with distilled water.
6. the assay method of total sulfur in a kind of water quality according to claim 1, it is characterized in that: in described step (2), the salpeter solution added is red fuming nitric acid (RFNA), and volume is 0.5 ~ 2mL.
7. the assay method of total sulfur in a kind of water quality according to claim 1, is characterized in that: in described step (2), keeps micro-heating 15min that boils, if there is not brown flocculent deposit, and can the proper extension heat time.
8. the assay method of total sulfur in a kind of water quality according to claim 1, is characterized in that: in described step (3), supplement volume of water sample to about 50mL with distilled water.
9. the assay method of total sulfur in a kind of water quality according to claim 1, it is characterized in that: in described step (3), the hydrochloric acid solution added in water sample is concentration is that 2.5moL/L dilute hydrochloric acid solution is about the micro-heating 5min that boils of 1mL, if brown layering is not fine, can the proper extension heat time.
10. the assay method of total sulfur in a kind of water quality according to claim 1, is characterized in that: in described step (1), and when in water quality during sulfur-bearing height, get suitable water sample after can diluting, institute's water sampling sulfur-bearing is not more than 3.3mg.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527238A (en) * | 2015-12-29 | 2016-04-27 | 瓮福达州化工有限责任公司 | A low-content sulfate radical detecting method for phosphoric acid purified by an industrial wet process |
| CN106885871A (en) * | 2015-12-15 | 2017-06-23 | 北京有色金属研究总院 | A kind of assay method of complicated solution middle and high concentration sulfate radical |
| CN107525802A (en) * | 2017-07-31 | 2017-12-29 | 成都中建材光电材料有限公司 | The detection method of sulfur content in a kind of selenium sample |
| CN107589036A (en) * | 2017-07-17 | 2018-01-16 | 贵州金洋检测工程有限公司 | Test methods of sulphur contents in a kind of water quality |
| CN108956494A (en) * | 2018-06-28 | 2018-12-07 | 中国铝业股份有限公司 | A kind of method of sulfate radical content in quick measurement bauxite |
| CN110927003A (en) * | 2019-11-14 | 2020-03-27 | 徐州伟天化工有限公司 | Method for detecting total sulfur in water |
| CN119780078A (en) * | 2025-03-07 | 2025-04-08 | 广东环凯生物技术有限公司 | Water quality sulfate detection reagent and preparation method thereof, water quality sulfate detection method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5152963A (en) * | 1986-08-04 | 1992-10-06 | Wreyford Donald M | Total sulfur analyzer system operative on sulfur/nitrogen mixtures |
| CN1311433A (en) * | 2000-03-03 | 2001-09-05 | 中国石油化工集团公司 | Method for measuring total active sulfur in petroleum fractions |
| AU2002336491A1 (en) * | 2001-09-11 | 2003-03-24 | Spectro Analytical Instruments | A method and apparatus for the on-stream analysis of total sulfur and/or nitrogen in petroleum products |
| JP2009150743A (en) * | 2007-12-20 | 2009-07-09 | Tokyo Electric Power Co Inc:The | Method for determination of sulfonic acid type sulfur content in insulating oil |
| CN102998274A (en) * | 2012-11-30 | 2013-03-27 | 华南理工大学 | Method for rapidly measuring total sulfur content in black pulping liquor |
| CN103389332A (en) * | 2013-07-26 | 2013-11-13 | 江苏东华分析仪器有限公司 | Electrolytic tank for determining total content of sulphur by adopting microcoulometric method |
-
2015
- 2015-05-21 CN CN201510263305.6A patent/CN104807949B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5152963A (en) * | 1986-08-04 | 1992-10-06 | Wreyford Donald M | Total sulfur analyzer system operative on sulfur/nitrogen mixtures |
| CN1311433A (en) * | 2000-03-03 | 2001-09-05 | 中国石油化工集团公司 | Method for measuring total active sulfur in petroleum fractions |
| AU2002336491A1 (en) * | 2001-09-11 | 2003-03-24 | Spectro Analytical Instruments | A method and apparatus for the on-stream analysis of total sulfur and/or nitrogen in petroleum products |
| JP2009150743A (en) * | 2007-12-20 | 2009-07-09 | Tokyo Electric Power Co Inc:The | Method for determination of sulfonic acid type sulfur content in insulating oil |
| CN102998274A (en) * | 2012-11-30 | 2013-03-27 | 华南理工大学 | Method for rapidly measuring total sulfur content in black pulping liquor |
| CN103389332A (en) * | 2013-07-26 | 2013-11-13 | 江苏东华分析仪器有限公司 | Electrolytic tank for determining total content of sulphur by adopting microcoulometric method |
Non-Patent Citations (2)
| Title |
|---|
| 薛秀玲等: "浊度仪法快速测定水体中硫酸盐含量", 《环境工程学报》, vol. 7, no. 4, 30 April 2013 (2013-04-30) * |
| 谢永洪等: "水样中硫酸盐快速测定方法的研究", 《皮革科学与工程》, vol. 17, no. 5, 31 October 2007 (2007-10-31) * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106885871A (en) * | 2015-12-15 | 2017-06-23 | 北京有色金属研究总院 | A kind of assay method of complicated solution middle and high concentration sulfate radical |
| CN105527238A (en) * | 2015-12-29 | 2016-04-27 | 瓮福达州化工有限责任公司 | A low-content sulfate radical detecting method for phosphoric acid purified by an industrial wet process |
| CN107589036A (en) * | 2017-07-17 | 2018-01-16 | 贵州金洋检测工程有限公司 | Test methods of sulphur contents in a kind of water quality |
| CN107525802A (en) * | 2017-07-31 | 2017-12-29 | 成都中建材光电材料有限公司 | The detection method of sulfur content in a kind of selenium sample |
| CN108956494A (en) * | 2018-06-28 | 2018-12-07 | 中国铝业股份有限公司 | A kind of method of sulfate radical content in quick measurement bauxite |
| CN110927003A (en) * | 2019-11-14 | 2020-03-27 | 徐州伟天化工有限公司 | Method for detecting total sulfur in water |
| CN119780078A (en) * | 2025-03-07 | 2025-04-08 | 广东环凯生物技术有限公司 | Water quality sulfate detection reagent and preparation method thereof, water quality sulfate detection method |
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