乳品中总砷检测方法的分析与研究
2022-06-07孙玉荣李永毅胡冬梅王勇马若影逯刚
孙玉荣 李永毅 胡冬梅 王勇 马若影 逯刚





摘 要:目的:分析与研究《食品安全国家标准 食品中总砷及无机砷的测定》(GB 5009.11—2014)总砷项目检测过程中所用还原剂的最优配制时间,以降低检测成本和缩短检测时间,提高检测结果准确性及工作效率。方法:对同一待测样品使用不同配制时间的还原剂进行样品检测,探索还原剂最优配制时间。结果:在还原剂最优配制时间内(5~60 min)检测样品,检测效率高,曲线线性好,准确度高。结论:还原剂最优配制时间在检测工作中提高了检测效率,予以推广。
关键词:乳品;总砷;还原剂
Analysis and Study on Detection Method of Total Arsenic
——Exploration of Optimal Preparation Time of Reducing Agent
SUN Yurong, LI Yongyi*, HU Dongmei, WANG Yong, MA Ruoying, LU Gang
(Mengniu Dairy (Chabei) Co., Ltd., Zhangjiakou 076481, China)
Abstract: Objective: The optimal preparation time of the reducing agent used in the detection process of total arsenic items in GB 5009.11-2014 was analyzed and studied, in order to reduce the detection cost and time, and improve the detection accuracy and work efficiency. Method: According to the same sample to be tested, the reducing agent with different preparation time was used for sample detection, and the optimal preparation time of reducing agent was explored. Result: The sample was detected within the optimal preparation time of reducing agent, with high detection efficiency, good curve linearity and high accuracy. Conclusion: The optimal preparation time of reducing agent improves the detection efficiency in the detection work and should be popularized.
Keywords: dairy; total arsenic; reducing agent
砷,俗稱砒,是一种非金属元素,在化学元素周期表中位于第4周期、第VA族,原子序数33,元素符号As。本文将通过对仪器检测原理分析和相关部件的介绍,同时根据文献资料,对总砷项目检测中,氢氧化钠和硼氢化钠混合溶液作为还原剂配制时间等因素进行分析和总结,帮助读者在了解基础理论的前提下,可以有目的地分析与解决所发生的问题[1]。
硼氢化钠是一种无机物,化学式为NaBH4,白色至灰白色细结晶粉末或块状,吸湿性强,其碱性溶液呈棕黄色,是最常用的还原剂之一。
由于温度、湿度、室内空气质量等环境因素和仪器性能、状态的差异,导致每位实验操作者的理解认知不同,在根据GB 5009.11—2014进行总砷测定时,还原剂的配制浓度、配制时间也各有不同[2]。基于此,笔者综述实验过程中的问题,探讨还原剂的最优配制时间。通过多组对照实验,使用不同配……
