摘要:
建立了高压气相色谱快速分析痕量长链烯酮的分析方法.选用快速分离色谱柱,对进样口压力、柱温箱程序升温速率进行优化,选择最佳的分析条件,使被测组分C37∶2、C37∶3和C37∶4长链烯酮达到基线分离,仪器分析周期减少至40 min.方法精密度(RSD,n=13)各长链烯酮均小于4%,检出限为10 ng/mL.
Abstract:
A method for the determination of C37 alkenones by high pressure gas chromatography using chromatographic column with high separation speed is proposed in this paper. The influences of carrier gas pressure and temperature programming rate on the determination results were studied. Under the condition of the temperature programming from 80℃ to 280℃ at the rate of 20 ℃/min and the head pressure of 550 kPa, the complete separation of C37 alkenones including C37:2, C37:3, C37:4 can be obtained and the period of the instrumental analysis is reduced to 40 min. The detection limit of the method is 10 ng/mL for long-chain alkenones with precision of less than 4%RSD (n=13).
Keywords:
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high-pressure
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gas
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chromatography
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C37
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alkenones
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