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Yohanes Susanto Ridwan
Research Unit for Clean Technology-Indonesian Institute of Sciences
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology

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Evaluation of Uncertainty in the Determination of Pesticide Residues in Tea using GC-ECD Yohanes Susanto Ridwan; Andreas Andreas; Dyah Styarini; Retno Yusiasih
Jurnal Kimia Terapan Indonesia Vol 19, No 1 (2017)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (458.211 KB) | DOI: 10.14203/jkti.v19i1.326

Abstract

Key indicator of quality in test results is the uncertainty value, which could be evaluated using several common approach. Uncertainty evaluation in a-endosulfan and bifenthrin in Oolong tea, and cypermethrin in green tea using bottom-up approach showed that uncertainty component arising from GC-ECD instrument calibration, method performance i.e. repeatability and recovery were the main contributors to total uncertainty. Uncertainty component arising from weighing, dilution factor, stock standard solution, calibration solution, and moisture correction had no significant effect to total uncertainty, hence they could be neglected. Relative standard uncertainty obtained for all of pesticides residue were 18.23, 10.44, dan 14.98% for a-endosulfan, bifenthrin, and cypermethrin, respectively. Comparison with 2/3 CV Horwitz of 17.33, 10.62, and 12.44%  respectively for all pesticide residues indicated that the evaluation of uncertainties were realistic
Co-Authors Andreas Andreas Dyah Styarini Retno Yusiasih