大豆油制备生物柴油中脂肪酸甲酯含量的气相色谱法测定

Determination method of fatty acid methyl esters in biodiesel from soybean oil by gas chromatograph

建立了大豆油生物柴油中各脂肪酸甲酯的气相色谱分析方法,并确立了分析条件.结果表明,5种脂肪酸甲酯的质量浓度在4～32 g·L-1的范围内具有良好的线性关系(r≥0.992 8);平均回收率在98.28%～101.85%,相对标准偏差小于0.31%;各脂肪酸甲酯的变异系数在0.17%～1.59%.

An accurate determination method of fatty acid methyl esters in biodiesel from soybean oil by GC was developed.The result showed that five kinds of fatty acid methyl esters were linear in range of 4 to 32 g·L-1（r≥0.992 8）.The average recovery was 98.28% to 101.85%,and relative standard deviation was less than 0.31%.The coefficiency of variance of precision was 0.17% to 1.59%.