Analysis of possible residual harmful substances in L-methionine products
L-蛋氨酸产品中可能残留的有害物质分析

摘要

目的 通过测定L-蛋氨酸中可能残留的有害物质含量，为行业发展提供数据支持。方法 通过行业调研，并结合文献研究，挖掘出L-蛋氨酸终产品中可能残留的有害物质主要有三类，一是重金属（砷、铅），二是有机溶剂（甲醇、乙醇），三是硫酸盐。本研究检测了来自8家企业64批次样品中三类物质残留量。结果 检测结果显示，重金属：铅，0.028 mg/kg -0.093 mg/kg，砷，00.0036mg/kg-0.0072mg/kg；有机溶剂：甲醇、乙醇均未检出；硫酸盐（以SO4 计）≤0.02%。结论 目前行业生产的L-蛋氨酸中有害物质残留水平较低，但仍需加强过程控制，尤其注意重金属残留，以保障终产品安全。

Abstract

Objective To provide data support for the development of the industry by determining the content of possible residual harmful substances in L-methionine.
Methods Through industry research and in combination with literature studies, it was discovered that there are mainly three types of harmful substances that may remain in the final product of L-methionine. The first is heavy metals (arsenic, lead), the second is organic solvents (methanol, ethanol), and the third is sulfate. This study detected the residue levels of three types of substances in 64 batches of samples from 8 enterprises.
Results The test results show that heavy metals: lead, 0.028 mg/kg- 0.093 mg/kg; arsenic, 00.0036mg/kg-0.0072mg/kg; Organic solvents: Neither methanol nor ethanol was detected. Sulfate (calculated as SO4) ≤0.02%.
Conclusion   Currently, the residue levels of harmful substances in L-methionine produced by the industry are relatively low. However, process control still needs to be strengthened, with particular attention paid to heavy metal residues to ensure the safety of the final product.