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All Journal Jurnal Inovasi Teknik Kimia Indonesian Journal of Chemical Science
Lailatul Mubarokah
Universitas Bojonegoro
Chemical Engineering, Chemistry & Bioengineering Chemistry Physics

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IDENTIFIKASI SIFAT TERMAL DAN IKATAN BATU KAPUR ALAM DENGAN MENGGUNAKAN DSC-TGA DAN FTIR Zuffa Anisa; Lailatul Mubarokah; Dyah Setyaningrum; Herta Novianto
Jurnal Inovasi Teknik Kimia Vol 8, No 3 (2023)
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v8i3.8504

Abstract

Batu kapur alam banyak sekali dijumpai di Bojonegoro, apalagi Bojonegoro merupakan daerah yang dikenal memiliki banyak gunung kapur. Salah satu jenis batu kapur alam ialah kalsium karbonat, yang memiliki banyak manfaat di berbagai bidang, baik industri, kesehatan, maupun industri pengolahan baja. Batu kapur alam termasuk ke dalam jenis kalsit CaCO3 dengan kandungan lebih dari 99% merupakan unsur Ca. Analisis termal diperlukan utuk mendeteksi perubahan-perubahan fase yang teramati, serta jenis-jenis senyawa yang terbentuk akibat penerapan temperatur. Selain itu juga dianalisis jenis ikatan batu kapur alam tersebut melalui FTIR. Persiapan sampel dilakukan dengan membentuk sampel menjadi bulk powder dengan menggunakan high energy ball milling. Hasil analisis FTIR menunjukkan adanya transmisi FTIR dari sampel CaCO3. Sedangkan hasil analisis dari DSC-TGA pada puncak 389,84 °C menunjukkan adanya kehilangan massa sebesar 2,91 mW. 
Qualitative and Quantitative Identification of Alcohol using the Conway Microdiffusion Method and Gas Chromatography-Flame Ionization Detector (GC-FID) on Evidence at the East Java Polda Bidlabfor Lailatul Mubarokah; Meilisa Rusdiana Surya Efendi
Indonesian Journal of Chemical Science Vol. 13 No. 2 (2024): Indonesian Journal of Chemical Science
Publisher : Prodi Kimia

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Abstract

Driving under the influence of alcohol is a safety issue of increasing public concern. Alcohol is a factor in many categories of accidents. Investigations and resolution of legal problems need to be followed up until the case is resolved in court. Items in the form of physical evidence related to the crime scene, victims and suspects need to be identified. Based on this, one of the topics raised in this research includes the results of identification and analysis of criminal cases involving alcohol consumption which were tested qualitatively and quantitatively, so that evidence can be determined during the investigation process as to whether there is alcohol content in it. In the process of qualitative identification of alcohol content, it is carried out using the Conway Microdiffusion method which states that the urine evidence is positive for alcohol, which is indicated by the color changing to green. Meanwhile, identification of alcohol levels in evidence is carried out using a Gas Chromatography -Flame lonization Detector (GC-FID). Analysis of the alcohol content in the evidence stated that the presence of ethanol was 0.0352%.
Co-Authors Dyah Setyaningrum, Dyah Herta Novianto Mochammad Imron Awalludin Zuffa Anisa