气相色谱法测定颜料类产品中10种苯系物含量

Determination of 10 Benzene Derivatives in Pigments by Gas Chromatography

采用外标法定量,建立了气相色谱法测定颜料类产品中10种苯系物含量的试验方法。实验结果表明,该方法在3.0~100.0 mg/kg范围内,线性良好,相关系数(r^(2))>0.9995,检出限为0.2~1.3 mg/kg。按照建立的方法进行了三个不同添加量加标回收试验,回收率为92.1%~111.9%,测定值的相对标准偏差(RSD)为0.61%~3.15%(n=6)。通过实际样品测定发现,部分颜料类产品检出了苯、二甲苯、苯乙烯和少量的三甲苯。

The external standard method was used for quantitative determination of 10 benzene derivatives in pigments by Gas Chromatography.The results showed that this method has good linearity in the range of 3.0~100.0 mg/kg with Relevant Coefficient(r^(2))much than 0.9995,and the detection limit is 0.2~1.3 mg/kg.Three recovery tests were carried out according to the established method.The recoveries were 92.1% to 111.9%,and the relative standard deviations(RSD)were 0.61% to 3.15%(n=6).Through the determination of actual samples,benzene,xylene,styrene and a small amount of trimethylbenzene were detected in some pigments.