液相色谱-氢化物发生原子荧光光谱法测定饲料中砷的形态

引用本文: 刘成新, 肖志明, 贾铮, 田静, 刘晓露, 樊霞. 液相色谱-氢化物发生原子荧光光谱法测定饲料中砷的形态[J]. 分析化学, 2018, 46(4): 537-542. doi: 10.11895/j.issn.0253-3820.171228 shu

Citation: LIU Cheng-Xin, XIAO Zhi-Ming, JIA Zheng, TIAN Jing, LIU Xiao-Lu, FAN Xia. Quantitative Determination of Arsenic Species in Feed Using Liquid Chromatography-Hydride Generation Atomic Fluorescence Spectrometry[J]. Chinese Journal of Analytical Chemistry, 2018, 46(4): 537-542. doi: 10.11895/j.issn.0253-3820.171228 shu

液相色谱-氢化物发生原子荧光光谱法测定饲料中砷的形态

中国农业科学院农业质量标准与检测技术研究所, 国家饲料质量监督检验中心(北京), 北京 100081
基金项目:
本文系"十三五"国家重点研发计划（No.2016YFF0201802）和中国农业科学院"饲料质量安全检测与评价"创新团队经费资助项目

摘要: 建立了饲料中亚砷酸盐（As³⁺）、砷酸盐（As⁵⁺）、一甲基砷酸（MMA）、二甲基砷酸（DMA）、对氨基苯胂酸（p-ASA）、羟基苯胂酸（4-OH）和洛克沙胂（ROX）共7种不同形态砷的高效液相色谱-氢化物发生原子荧光光谱（HPLC-HG-AFS）分析方法。饲料样品采用甲醇-水（1∶1，V/V）溶液提取，15 mmol/L（NH₄）₂HPO₄和10 mmol/L邻苯二甲酸氢钾为流动相，经PRP-X100阴离子交换色谱柱分离后，由HG-AFS测定。结果表明，7种砷形态标准曲线的线性关系良好（R²≥0.9964），方法检出限为5~30 μg/kg，平均回收率为76.3%~108.1%，日内相对标准偏差≤7.7%，日间相对标准偏差≤17.4%。本方法灵敏度高、前处理简单、运行费用低廉，适用于饲料产品中砷的形态分析。

关键词:

English

Quantitative Determination of Arsenic Species in Feed Using Liquid Chromatography-Hydride Generation Atomic Fluorescence Spectrometry

China National Feed Quality Control Center, Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Received Date: 04 September 2017
Revised Date: 04 February 2018
Fund Project:
This work was supported by the National Key Research and Development Program of China during the Thirteenth Five-year Plan Period.

Abstract: A sensitive and rapid method using liquid chromatography-hydride generation atomic fluorescence spectrometry (HPLC-HG-AFS) was developed for the simultaneous determination of seven arsenic species As³⁺, As⁵⁺, MMA, DMA, p-ASA, 4-OH and ROX in feeds. The isolation of the analytes from feed samples was accomplished using methanol water (1:1, V/V). The target compounds were separated on a PRP-X100 anion exchange column and then analyzed by HG-AFS. The mobile phase was 15 mmol/L (NH₄)₂HPO₄ and 10 mmol/L potassium acid phthalate. Good linearity was obtained for all of the seven arsenic species, with linear coefficients higher than 0.9964. The LODs of the seven arsenic species were between 5 and 30 μg/kg. Average recoveries for the seven analytes were in the ranges of 76.3%-108.1%, with intra-and inter-day repeatability lower than 7.7% and 17.4%, respectively. This validated method was successively applied to the determination of arsenic species in feed. This method was sensitive, simple, cheap and low operation cost, and could be used for the determination of the arsenicspecies in feeds.

Key words:

Liquid chromatography
/ Hydride generation-atomic fluorescence spectrometry
/ Feed
/ Arsenic
/ Species analysis

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沈阳化工大学材料科学与工程学院沈阳 110142

液相色谱-氢化物发生原子荧光光谱法测定饲料中砷的形态

English

Quantitative Determination of Arsenic Species in Feed Using Liquid Chromatography-Hydride Generation Atomic Fluorescence Spectrometry

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液相色谱-氢化物发生原子荧光光谱法测定饲料中砷的形态

English

Quantitative Determination of Arsenic Species in Feed Using Liquid Chromatography-Hydride Generation Atomic Fluorescence Spectrometry

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

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