摘要
建立食用菌中掺杂石蜡的气相色谱/质谱联用测定方法。样品经超声提取和过滤、浓缩后进气质联用仪分离检测。通过对9种主要正构烷烃的定量测定,可以定性地鉴别是否掺杂石蜡。该方法对9种正构烷烃的检出限为3μg/kg～15μg/kg,平均回收率为84.4%～101.0%,相对标准偏差(RSD)为1.1%～7.8%(n=3)。9种正构烷烃在30 ng/mL～3000 ng/mL浓度范围内呈良好的线性关系,线性回归系数r均大于0.999 6。
A simple and rapid gas chromatography/mass spectrometry method for determination of adulterated paraffin in edible fungus was developed.After extracted from the sample by ultrasonic and filtered,the analytes were chromatographically analyzed on a GC/MS.Whether the paraffin was adulterated could be qualitatively identified via the quantification of 9 n-alkanes.The assay was linear over the concentration range 30 ng/mL-3 000 ng/mL,and the correlation coefficients were all more than 0.999 6.The detection limits were 3 μg/kg-15 μg/kg for 9 n-alkanes.The recoveries were 84.4 %-101.0 % and the relative standard deviations were 1.1 %-7.8 %（n=3） for 9 n-alkanes.
出处
《食品研究与开发》
CAS
北大核心
2010年第12期133-135,共3页
Food Research and Development
基金
福建省自然科学基金资助项目(2009J05020)
