空气/氩气双通气-原子吸收石墨炉法测定食用油中的二甲基硅氧烷

Determination of the content of polydimethylsiloxane by graphite furnace atomic absorption spectrometry with air-oxygen double ventilation technology in edible oils

中文关键词:  食用油脂  聚二甲基硅氧烷  石墨炉原子吸收光谱法  空气-氧气双通气技术

英文关键词:edible oils  polydimethylsiloxane  graphite furnace atomic absorption spectrometry  air-oxygen double ventilation technology

中文摘要:

      目的 建立空气/氩气双通气—原子吸收石墨炉法测定食用油中二甲基硅氧烷的分析方法。方法 采用航空煤油为稀释剂, 按照油/溶剂(1:9, 质量比)稀释后直接进入石墨炉测定。结果 测定样品的相关系数为0.9986, 方法检出限为0.07 mg/kg, 相对标准偏差为1.08%~4.74% (n=6), 加标回收率为94.3%~109.7%。结论 该方法快速、方便、重复性好、准确度高, 适用于食用油样品的大批量检测分析。

英文摘要:

      Objective To establish a method for the analysis of polydimethylsiloxane (silicone) in edible oils by graphite furnace atomic absorption spectrometry with air-oxygen double ventilation technology. Methods Aviation kerosene was used as diluent and diluted in accordance with oil/solvent (1:9, mass ratio) and then directly into the graphite furnace for determination. Results The correlation coefficient of the calibration curves was 0.9986, the limit of detection was 0.07 mg/kg, the relative standard deviations (n=6) were 1.08%?4.74% (n=6), and the recoveries were 94.3%?109.7%. Conclusion This method is fast, convenient, repeatable and accurate, and is suitable for the detection and analysis of large quantities of edible oil samples.