安徽农业科学2025，Vol.53Issue(9)：162-164,226,4.DOI:10.3969/j.issn.0517-6611.2025.09.035
生物有机肥混合样品中5种重金属残留的测定
Determination of Five Heavy Metal Residues in Bio-organic Fertilizer Mixed Samples
唐淑军 1梁幸 1范明志 2周春梅 1宋晓仪 1郑奕柔 3宋世文1
作者信息
- 1. 深圳市质量安全检验检测研究院,广东 深圳 518101
- 2. 深圳信测标准技术服务有限公司,广东 深圳 518101
- 3. 深圳市通量检测科技有限公司,广东 深圳 518101
- 折叠
摘要
Abstract
[Objective]To mix 10 samples of bio organic fertilizers into one mixed sample for mixed sample detection,and establish a micro-wave digestion inductively coupled plasma mass spectrometry method for rapid detection of five heavy metal residues(As,Pb,Cd,Cr,Hg)in bio-organic fertilizer mixed samples.[Method]The 1.0 g mixed sample was weighed,and the internal standard(Ge,Bi,Rh)and Au solu-tion were added,nitric acid and hydrogen peroxide were added,microwave digestion was carried out,the matrix effect of the mixed sample was eliminated by isotope internal standard preprocessing,and the mass spectrum interference was eliminated by KED mode.Au solution was added as the stabilizer of mercury standard solution to ensure the accuracy and sensitivity of the method.The method was quantified by internal standard method.[Result]The linear relationship was good in 0.5-500.0 μg/L As,Pb,Cd and Cr,and 0.05-5.00 μg/L Hg.The linear correlation coefficient was 0.999 1-0.999 9,and the detection limit was 0.004-0.200 μg/kg.The recovery rate of spiked samples was 89.4%-108.7%,RSD was 0.7%-8.9%,which fully met the requirements of the national standard method GB/T 27404.[Conclusion]This method has high sensitivity,accuracy and stability,and can achieve simultaneous determination of 5 heavy metals residues in single and mixed samples of bio-organic fertilizer.Using this method to determine mixed samples,when the expected exceedance rate of bio-organic fertilizer is not greater than 1%,the detection efficiency is 5.0-9.1 times that of single sample detection;the expected exceedance rate is greater than 1%to 2%,and the detection efficiency is more than 3.3 times that of single sample detection;the expected exceedance rate is greater than 2%to 3%,and the detection efficiency is more than 2.5 times that of single sample detection.关键词
混合样品/生物有机肥/重金属残留/同位素内标前置/微波消解/电感耦合等离子体质谱Key words
Mixed samples/Bio-organic fertilizer/Heavy metal residue/Isotope internal standard prefixed/Microwave digestion/Inductively coupled plasma mass spectrometry分类
农业科学引用本文复制引用
唐淑军,梁幸,范明志,周春梅,宋晓仪,郑奕柔,宋世文..生物有机肥混合样品中5种重金属残留的测定[J].安徽农业科学,2025,53(9):162-164,226,4.
