食品与机械2025，Vol.41Issue(10)：34-42,9.DOI:10.13652/j.spjx.1003.5788.2025.80039
氨基酸分析仪测定羊奶粉中含硫氨基酸及不确定度评定
Determination of sulfur-containing amino acids in goat milk powder by amino acid analyzer and uncertainty evaluation
摘要
Abstract
[Objective]To evaluate the uncertainty during the determination of sulfur-containing amino acids in goat milk powder by an amino acid analyzer.[Methods]The mathematical model and fishbone diagram of the uncertainty source are established to analyze and quantify the introduced uncertainty components.Then,the combined uncertainty and extended uncertainty are calculated.[Results]When the mass fractions of cystine,cysteine,and methionine are 0.305,and 0.338 g/100 g,the extended uncertainty is 0.022,and 0.023 g/100 g,respectively(k=2).[Conclusion]The uncertainty of this method mainly comes from the weighing of standard material and samples,as well as the preparation of the standard series working solution,which should be strictly controlled during sample testing.关键词
羊奶粉/含硫氨基酸/氨基酸分析仪/不确定度Key words
goat milk powder/sulfur-containing amino acid/amino acid analyzer/uncertainty引用本文复制引用
李璐,刘丹,强鑫,王琳,张华峰..氨基酸分析仪测定羊奶粉中含硫氨基酸及不确定度评定[J].食品与机械,2025,41(10):34-42,9.基金项目
陕西省重点研发计划项目(编号:2024GH-YBXM-16,2025GH-YBXM-079) （编号:2024GH-YBXM-16,2025GH-YBXM-079）
渭南市科技计划项目(编号:2022ZDYFJH-47) （编号:2022ZDYFJH-47）
