食品科学

• 安全检测 • 上一篇    下一篇

氧化亚氮-乙炔火焰-连续光源原子吸收光谱法测定植物油中的聚二甲基硅氧烷

汪 雨,祖文川,李冰宁,武彦文,陈舜琮   

  1. 北京市理化分析测试中心,北京 100089
  • 出版日期:2015-01-25 发布日期:2015-01-16
  • 基金资助:

    北京市科学技术研究院青年骨干计划项目(2012-006);
    北京市财政资金支持项目(PXM2013_178305_000005;PXM2013_178305_000009);
    国家重大科学仪器设备开发专项(2011YQ15004011)

Determination of Polydimethylsiloxane in Vegetable Oils Using Continuum Source Atomic Absorption Spectrometer with Nitrous Oxide-Acetylene Flame

WANG Yu, ZU Wenchuan, LI Bingning, WU Yanwen, CHEN Shuncong   

  1. Beijing Center for Physical and Chemical Analysis, Beijing 100089, China
  • Online:2015-01-25 Published:2015-01-16

摘要:

建立利用氧化亚氮-乙炔火焰-连续光源原子吸收光谱法,以4-甲基-2-戊酮有机溶剂直接进样测定植物油中聚二甲基硅氧烷含量的方法。在优化实验条件下,聚二甲基硅氧烷在4~500 mg/L质量浓度范围内具有良好的线性关系,相关系数r为0.999 3。实验在3 个聚二甲基硅氧烷添加水平条件下,平均回收率在95.6%~103.7%之间,6 次重复测定的相对标准偏差为2.3%~3.1%。实验获得本方法的检出限为2.05 mg/kg。该方法可满足于植物油中聚二甲基硅氧烷含量的测定。

关键词: 聚二甲基硅氧烷, 植物油, 氧化亚氮-乙炔火焰, 连续光源原子吸收光谱法

Abstract:

A method for the analysis of polydimethylsiloxane in vegetable oils using a continuum source atomic absorption
spectrometer (CS-AAS) with a nitrous oxide-acetylene flame has been devised. Under the optimal experimental conditions,
the absorbances had a good linear relationship with polydimethylsiloxane concentrations in the range of 4 to 500 mg/L (r =
0.999 3). Recoveries of the proposed method were 95.6%–103.7% for spiked samples with relative standard deviation (RSD)
of 2.3%–3.1% (n = 6). The limit of detection of this method was 2.05 mg/kg for polydimethylsiloxane. The proposed method
was applied in the analysis of polydimethylsiloxane in vegetable oils with satisfactory results.

Key words: polydimethylsiloxane, vegetable oil, nitrous oxide-acetylene flame, continuum source atomic absorption spectrometry

中图分类号: