查询词典 headspace

A static headspace GC-MS method was used to detect sulfur in the fumatory Radix Bupleuri,the authentic samples free of sulfur was detected as reference.

运用静态顶空毛细管气相色谱-质谱联用技术进行检测市售柴胡是否经硫黄熏蒸，并从产地采集未经硫黄熏蒸的柴胡作为阴性对照药材与市售柴胡进行比较。

Then the fiber was transferred to a 4 mL vial which was filled with 100 μL of trifluoroacetic anhydride and stood 30 sec for headspace extraction. Afterward the fiber was transferred again to another blank 4 mL vial and stood 10 min for on-fiber derivatization before the analysis with GC/MS. The absorption-time profiles for both furoic acid and creatinine were examined.

有关尿中肌酸酐的量测，首先亦使用65μm PDMS/DVB纤维，在电磁搅拌转速1200rpm下以直接样本接触方式吸附60秒后，将已吸附肌酸酐的纤维挪至装有100μL无水三氟醋酸的4mL样本瓶中顶空吸附30 sec，再将纤维挪至另一个空白的样本瓶并静置10min（以利衍生物trifluoroacetamide的生成），最后再以气相层析质谱仪进行分析。

Plastics/rubber - Polymer dispersions and rubber latices; Determination of residual monomers and other organic components by capillary-column gas chromatography - Part 2: Headspace method ISO

塑料/橡胶。聚合物分散体和橡胶胶乳。用毛细管柱气相色谱法测定残留单体和其他有机成分。第2部分：顶空法

A GC headspace injection method for the determination of residual organic solvents such as methanol, ethanol, acetonitrile, dichloromethane, ethylacetate, 4 methyl 2 pentanone, toluene, DMF, chloroform and tetrahydrofuran in tazobactam was established.

建立了气相色谱顶空进样法测定三唑巴坦中甲醇、乙醇、乙腈、二氯甲烷、乙酸乙酯、甲基异丁基酮、甲苯、N ，N′-二甲基甲酰胺、氯仿和四氢呋喃等有机溶剂的残留量。

Headspace ; chloroform ; tetrachloro\|methane ; water

顶空法；氯仿；四氯化碳；水质

Methods For the mild solubility of chloroform and tetrachloromethane in drinking water, chloroform and tetrachloromethane were analysed by static headspace gas chromatography with DB-5, Rtx-1 and DB-1 capillary columns and electron capture detector, external standard method was used for quantification.

利用氯仿和四氯化碳在水中的弱溶解性，采用静止顶空气相色谱法进行分析，使用DB-5、Rtx-1和DB-1毛细管柱和电子捕获监测器测定，外标法定量。

This paper investigates that the different composition of the headspace gas and polluted sediment slurries can affect the ratios of degradation on benzoic acid, toluic acid and phthalic acid isomers. We found that a sediment slurry which has been polluted can develop a stronger microbial degradation.

此篇文章主要是探讨不同上层气体之组成和被污染过之底泥可影响苯甲酸、甲基苯甲酸异构物及苯二酸异构物被分解的速率，我们发现被污染过之底泥可发展出较强之微生物降解力。

It is important to protect the wine from oxidation (usually done by sparging the headspace with inert gas) and to regularly taste check the wine (for polymerisation and H2S development) during this period.

葡萄酒是重要保障氧化(通常所做的顶与惰性气体喷射)和定期检查葡萄酒品尝在此期间。

A method for the determination of residual ethyl acetate in green tea extract has been studied by headspace gas chromatography in order to set up an analysis method.

采用顶空气相色谱法对绿茶提取物中乙酸乙酯残留溶剂的分析方法进行了研究。

Firstly, headspace solid-phase microextraction was established to determine AITC by orthogonal design. Extraction temperature, stir speed, extraction time, and desorption time were set at 40℃, 900r/min, 30min, and 5min, respectively. Under these optimal conditions, volatile flavor compounds in mustard oil, wasabi, and 'Chongcai'leaf mustard product were identified by SPME/GC/MS. In these three samples, 6,12,17 constituents were identified respectively; Allyl isothiocyanate was the main flavor compound, which accounted for 73.45%, 64.25%, 32.74% of total volatile compounds, respectively. Carbon disulfide, a hydrolysis product of AITC, accounted for 14.37% 25.40%, 51.67% of total volatile compounds respectively. There were some other isothiocycannates, such as butane, 1-isothiocyanato-, isobutyl isothiocyanate, 1-benzene, 4-isothiocyanato-, benzene (2-isothiocyanatoethyl)-, etc.

首先采用正交实验设计优化固相微萃取技术的前处理条件，结果表明，以萃取温度40℃、搅拌速度900r／min、萃取时间30min、解吸时间5min为最佳条件；在此最优条件基础上，利用SPME／GC／MS联用技术分析芥末油、青芥辣、冲菜的挥发性风味成分，分别检出6、12、17种化合物，主要风味物质均为AITC，相对丰度分别为73.45％、64.25％、32.74％；AITC的水解产物二硫化碳的相对丰度分别为14.37％、25.40％、51.67％；还检测到了其它几种异硫氰酸酯，如异硫氰酸丁酯、异硫氰酸异丁酯、异硫氰酸丁烯酯、2-苯乙基异硫氰酸酯等。

He paid $5,000 for this cupcake.

他我这个纸杯蛋糕花了5000美元。

I mean, if you want to, that is

我的意思是，如果你们想吃的话。