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All Journal Alchemy : Journal of Chemistry Jurnal SainHealth
Rosalina Djatmika
Brawijaya University
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology

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PENETAPAN KADAR FORMALDEHID DALAM IKAN ASIN DI TULUNGAGUNG MENGGUNAKAN METODE SPEKTROFOTOMETRI VISIBLE Muadifah, Afidatul; Djatmika, Rosalina; Ariani, Fahima
Jurnal SainHealth Vol 3, No 1 (2019): Maret 2019
Publisher : Faculty of Health Sciences Universitas Maarif Hasyim Latif

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51804/jsh.v3i1.312.1-6

Abstract

Formaldehyde steam stimulates the mucous membranes of the nose, throat and burning sensation. The use of formaldehyde as a preservative in food still occurring to date, one of which is the use of formaldehyde in salted fish consumed by community. The purpose of this study was todeterminetheoptimum condition of visible spectrophotometry methodand to know the concentration offormaldehyde contained insalted fish sold at Tulungagungwhich wasanalyzed using visible spectrophotometry method.The method used in this research is wavelength and solvent optimazation. Validation used is linearity, accuracy and precision. The identification of formaldehyde of salted fish was qualitatively identified using the peelof dragon fruit and KMnO4and quantitative using visible spectrophotometry method.Theresult of the research obtainedoptimumwavelengthis 530 nm, the optimum solvent is aquades. Result of linearity test obtained y = 0.003x + 0.489 with R2= 0.989. The accuracy test obtained recovery of 101.90% and precision test obtained SD = 1.583 and RSD = 1.95%. Qualitative test was obtained from 6 salted fish samples analyzed, all samples positive contain formaldehyde. In a quantitative analysis obtained formaldehyde of 72± 1,583 ppm.
Optimization of Silylation for Parabens Determination by Gas Chromatography-Mass Spectrometry Djatmika, Rosalina; Ding, Wang-Hsien
ALCHEMY Vol 5, No 2 (2016): ALCHEMY
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (640.488 KB) | DOI: 10.18860/al.v5i2.3743

Abstract

A low cost, environmental friendly and convenient method for parabens derivatization using Gas Chromatography-Mass Spectrometry (GC-MS) analysis is investigated. Derivatization is needed to enhance the thermal stability, detectability, and volatility of parabens to make them amenable for gas chromatographic analysis. This method involved on-line derivatization by silylating reagent: N-Methyl-N-tert-butyldimethylsilyltrifluoroacetamide (MTBSTFA), N,O-bis (trimethylsilyl) trifluoroacetamide (BSTFA), N-methyl-N-trimethylsilyltrifluoroacetamide (MSTFA), and N,O-bis(trimethylsilyl)acetamide (BSA). The variables affected the derivatization process, such as, types and volumes of silylating reagents, injection port temperature, and purge-off time, were evaluated to obtain the optimal condition for determination of parabens. The Relative Response Factors (RRF) was used as a parameter of parabens derivatization efficiency to obtain the best compromise condition of each variable. On a comprehensive level, a comparison of the optimal condition of each silylating reagent was evaluated. Moreover, 1 µL of MSTFA  at 260°C of injection port temperature and 2.5 min purge-off time (in splitless mode) obtained the most effective of derivatization process.
Co-Authors Ariani, Fahima Muadifah, Afidatul Wang-Hsien Ding