查询词典 headspace

The article presents the method of determination of volatile benzenes in water with twice phase equilibration/Headspace GC.

选择7种水中挥发性苯系物作为研究对象，提出了两次相平衡／液上气相色谱法测定水中挥发性有机物的方法。

Objective To establish a method for determining the residues of nine kinds of organic solvents in imiquimod by headspace gas chromatography.

目的建立顶空气相色谱法测定咪喹莫特中9种有机溶剂残留量的方法。

In the best condition of headspace and chromatogram, the mensuration of aquatic trace volatile can get a satisfaction result such as chloroform , carbon tetrachloride , trichloroethylene and perchlorethylene, all relativity standard deviation RSD is less than 4%,all the correlation coefficient R is larger than 0.99, and the relative error is less than 3%.

在选择最佳的顶空和色谱条件下，测定水中痕量挥发物三氯甲烷，四氯化碳，三氯乙烯和四氯乙烯可获得令人满意的结果，相对标准偏差RSD均小于4%，相关系数R均大于0.99，相对误差小于3%。

The detection limit was 10 times better than the conventional SPME method. Under the optimized analytical conditions, aqueous samples of trichloroethylene/perchloroethylene (20 μg/L) and benzene/toluene (10 μg/L) were analyzed. The δ13C fractionation compared to pure-phase and headspace analysis was less than 0.5‰.

在优化的条件下，对20 μg/L的三氯乙烯/四氯乙烯和10 μg/L的苯/甲苯水溶液进行了单体碳同位素分析，相比于纯溶剂碳同位素值，顶空同位素分析误差不超过0.5‰，而样本标准偏差为0.3‰。

Effect of pH on the formation of volatile and semi-volatile substances in the maillard reaction systems of arabinose/cysteine was analyzed and compared by the method of headspace-solid microextraction associated with gas chromatography-mass spectrography.

利用顶空-固相微萃取-气质联用法，分析和比较不同pH条件对阿拉伯糖/半胱氨酸模型体系挥发性风味物质形成的影响。

While I was in that headspace I couldn't relax and I would be uptight.

当我处在顶尖位子的时候，我不可能放松，我将时刻保持紧张。

In the work, microwave distillation coupled with headspace solid-phase microextraction was developed for the rapid determination of essential oils in Alpinia oxyphylla Miq.fruits and Houttuynia cordata Thunb.

天然植物精油是调味品、药物和天然香料的重要来源，对其挥发性成分的研究在食品、日用品、化妆品、制药和烟草等行业有着重要的意义和作用。

The acquisition method of volatile compounds, from different mechanical damage exent of oriental arborvitae, are the dynamic headspace body of improved air circulation Acquisition Act.

利用改进了的动态顶空气体循环采集法，对受不同程度机械损伤侧柏木释放的挥发物进行了采集粗提，通过热脱附冷阱-气相色谱-质谱联用仪进行了提取分析鉴定。

A static headspace-gas chromatography-mass spectrometrymethod was used to analysis volatile compounds from the six kinds of Bupleurum from different areas.

运用静态顶空毛细管气相色谱质谱法对6种不同产地柴胡的挥发性成分进行了检测，并运用质谱检索和保留指数相结合的手段对检出的挥发性成分进行定性，6种柴胡中定性相对含量大于0.2%的挥发性成分60种。

In this research, we used Trifluoroacetic anhydride as a derivatizing agent to esterify the trace glycerol in biodiesel, followed by the determination of trace glycerol using microwave assisted headspace SPME extraction technique combined with GC-ECD.

本研究利用三氟醋酸酐与生质柴油中的微量甘油进行酯化反应，反应后的衍生物以本实验室开发的微波辅助顶空固相微萃取装置采样，并以气相层析仪搭配电子捕捉侦测器作分析。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。