@article{ZHANG2025, 
author = {Ting ZHANG and Shuting WANG and Jia LI and Yanzhuo CHE and Li LING and Yongbin CHENG},
title = {Uncertainty Evaluation for the Determination of Melamine Residue in Milk Powder by Gas Chromatography-Mass Spectrometry},
year = {2025},
journal = {Journal of Dairy Science and Technology},
volume = {48},
number = {5},
pages = {67-71},
keywords = {melamine, gas chromatography-mass spectrometry, evaluation of uncertainty},
url = {https://www.sciopen.com/article/10.7506/rykxyjs1671-5187-20250609-042},
doi = {10.7506/rykxyjs1671-5187-20250609-042},
abstract = {ObjectiveTo evaluate the uncertainty for the determination of melamine residue in milk powder by gas chromatography-mass spectrometry (GC-MS).MethodsFollowing the Guidance on quantifying uncertainty in chemical analysis (CNAS-GL006: 2019), a mathematical model was established to analyze and evaluate the sources of uncertainty in the determination of melamine residue in milk powder by GC-MS according to the Chinese National Standard Determination of melamine in raw milk and dairy products (GB/T 22238-2008). The combined standard uncertainty was calculated from the uncertainty components.ResultsThe melamine content of the milk powder sample was determined to be 2.090 mg/kg with an extended uncertainty of 0.182 mg/kg (k = 2).ConclusionThe uncertainty mainly came from sample volume adjustment, sample recovery, standard solution preparation and curve fitting.}
}