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- Title
双四极杆电感耦合等离子体质谱(ICP-MS/MS)法 测定婴幼儿配方奶粉中的硒含量
- Authors
袁埜; 陈家伟; 赵娜娜; 毛思浩; 梁晶晶
- Abstract
When the selenium content in infant formula food was determined by inductively coupled plasma mass spectrometry(ICP-MS), the content of selenium was often high due to its difficult ionization and mass spectrum interference・ In this study, sensitizing carbon-containing organic matter and interfering with different analysis modes were studied to establish a method for the accurate determination of selenium in infant formula by inductively coupled plasma-mass spectrometry. By analyzing the sensitization effect of different carbon containing organics, such as methanol, ethanol, isopropyl alcohol, and n-butanol, investigating the influence of organic concentration in the range of 0% to 10% 9 and studying the antimass spectrometry interference ability under different instrumental analysis modes such as standard mode(no gas mode), single pole helium collision mode (He mode), series helium collision mode(HeHe mode) and series oxygen reaction mode (O2 mode), the optimal conditions for the analysis of selenium content in infant formula were determined. The reagent with the best sensitization effect was 5 % n-butanoL Compared with other analysis modes, ICP-MS/MS with oxygen mode was more accurate in selenium detection in quality control samples of infant formula. The results indicated that, the calibration curves were linear in the range of 0. 50 -- 10. 00 yg/L the correla tion coefficients were more than 0. 999, the average recoveries of Se in infant formula reached 95. 3% -- 99.9%, the precision was less than 5%, and the detection and quantification limits were 0. 1 mg/kg and 4 mg/kg, respectively. Compared with the results pretreated by atomic fluorescence spectrophotometry for Ltest, the detection values obtained by this method had no significance difference in various types of commercially available infant formulaCP05)・ The method has the advantages of simple operation, low detection limit and accurate detection results, and is suitable for the accurate measurement of selenium in infant formula.
- Publication
Chinese Journal of Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue, 2024, Vol 14, Issue 4, p484
- ISSN
2095-1035
- Publication type
Article
- DOI
10.3969/j.issn.2095-1035.2024.04.015