甲醛反应赶酸法快速排除硝酸及亚硝酸对硒和砷测定的干扰  

Rapid elimination of interference from nitric acid and nitrous acid on selenium and arsenic determination using formaldehyde reaction acid elimination method

作　　者：李雪 杨兵 上官佳 LI Xue;YANG Bing;SHANGGUAN Jia(Huaihua Inspection&Testing Center,Huaihua 418000,Hunan,China;Huaihua Grain and Oil Product Quality Inspection Center,Huaihua 418000,Hunan,China;Hunan Provincial Institute of Product and Goods Quality Inspection,Huaihua 418000,Hunan,China)

机构地区：[1]怀化市检验检测中心,湖南怀化418000 [2]怀化市粮油产品质量检测中心,湖南怀化418000 [3]湖南省产商品质量检验研究院,湖南怀化418000

出　　处：《粮食与油脂》2025年第4期150-154,共5页Cereals & Oils

摘　　要：为了避免繁琐费时的赶酸工作,建立一种利用甲醛快速去除微波消解液中硝酸及亚硝酸的方法,排除其对氢化物发生原子荧光光谱法测定富硒谷物中硒(Se)、砷(As)干扰。对湖南大米标准物质[GBW10045a(GSB-23a)]中硒和砷进行分析,2种元素检测结果都在标准值置信范围内,Se加标回收率为93.0%~103.5%,As加标回收率为94.0%~102.5%。方法简便快捷、灵敏度高、准确性好,适合于富硒谷物中硒和砷含量的快速准确测定。In order to avoid tedious and time-consuming acid elimination work,a method for rapidly removing nitric acid and nitrous acid from microwave digestion solution using formaldehyde was established to eliminate its interference with the determination of selenium(Se)and arsenic(As)in selenium rich grains by hydride generation atomic fluorescence spectrometry.The analysis of selenium and arsenic in Hunan rice standard substance GBW10045a(GSB-23a)showed that the detection results of both elements were within the confidence range of the standard values.The recovery rates of Se and As were 93.0%to 103.5%and 94.0%to 102.5%,respectively.The method was simple,fast,highly sensitive,and accurate,suitable for the rapid and accurate determination of selenium and arsenic content in selenium rich grains.

关 键 词：甲醛 微波消解 氢化物发生原子荧光光谱法 硒(Se) 砷(As) 

分 类 号：TS207.3[轻工技术与工程—食品科学]