head space

Residual methanol in oxytetracycline hydrochloride was determined by head space GC. The average recovery was 99.8 %.

采用顶空气相色谱法测定盐酸土霉素中的残留甲醇, 平均回收率为99.8%.

A method of head space solid phase microextraction ( HS-SPME) coupled with gas chromatography-mass spectrometry for the determination of tetramethyllead and tetraethyllead in water sample was developed. The conditions of SPME extraction and GC-MS determination were discussed.

建立了顶空固相微萃取（HS SPME）与气相色谱质谱（GC/MS）联用测定水样中四甲基铅和四乙基铅的方法，探讨了SPME萃取烷基铅的实验条件，并对GC/MS条件进行了优化。

Gas chromatographic analysis technique for cutting head space gas and its application in hydrocarbon exploration

岩屑罐顶气气相色谱分析技术及其在油气勘探中的应用

Blood samples were analyzed for ethanol, aceta-dehyde and acetate by head space gas chroma-tography using a porapak S column.

本文用顶空气相色谱法，在Porapak S柱上测定人血中乙醇及其代谢物乙醛、乙酸。

Residual methanol oxytetracycline hydrochloride was determined by head space GC. The average recovery was 99.8 %.

采用顶空气相色谱法测定盐酸土霉素中的残留甲醇,平均回收率为99. 8%.