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衍生气相色谱法     
相关语句
  gas chromatography with derivation
     Gas chromatography with derivation was described for the determination of trace formaldehyde in food packing material.
     本文建立了测定食品包装材料中甲醛的衍生气相色谱法
短句来源
  derivative gas chromatography
     Objective To establish a derivative gas chromatography method simultaneously quantitative determination of Octadecadienoic acid,α-Octadecatrienoic Acid,γ-Octadecatrienoic Acid,AA,EPA and DHA altogether six unsaturated fatty acids.
     目的建立衍生气相色谱法同时检测分析亚油酸、α-亚麻酸、γ-亚麻酸、AA、EPA、DHA等六种不饱和脂肪酸。
短句来源
     A method for determination of dissociate formaldehyde in cosmetics by derivative gas chromatography analysis was presented in the paper. The lowest detection limit of analysis was 5 75pg;
     建立了测定化妆品中游离甲醛的衍生气相色谱法 ,方法最小检测量可达 5 75pg;
短句来源
     Determination of dissociate formaldehyde in cosmetics by derivative gas chromatography analysis
     衍生气相色谱法测定化妆品中的游离甲醛
短句来源
     Determination of Phenol in Ink With Derivative Gas Chromatography
     衍生气相色谱法测定墨汁中的苯酚
短句来源
     Separation of Arsenic (Ⅲ) and Arsenic (Ⅴ) by Sulfhydryl Cotton Fiber and Determination of Trace Arsenic by Derivative Gas Chromatography
     巯基棉纤维分离、衍生气相色谱法测定痕量砷(Ⅲ)和砷(Ⅴ)
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  “衍生气相色谱法”译为未确定词的双语例句
     Determination of Trace Release Formaldehyde in Textiles by Gas Chromatography
     衍生气相色谱法测定纺织品痕量释放甲醛
短句来源
     GC-FID-Derivative Technique Simultaneous Determination of Octadecadienoic Acid,α-Octadecatrienoic Acid,γ-Octadecatrienoic Acid,AA,EPA and DHA
     衍生气相色谱法同时检测分析亚油酸、α-亚麻酸、γ-亚麻酸、AA、EPA、DHA
短句来源
     Determination of 2-Acetoxyisobutyryl Bromide by Gas Chromatography with Pre-derivatization
     柱前衍生气相色谱法测定2-乙酰氧基异丁酰溴
短句来源
     Determination of Trace Phenol in Water With Bromide Derivatization and Gas Chromatography
     溴化衍生气相色谱法测定环境水体中痕量苯酚
短句来源
     Trace release formaldehyde in textiles is collected by water, derivatized with 2, 4 dinitrophenylhydrazine and extracted by cyclohexane.
     建立了用水萃取出纺织品中痕量释放甲醛 ,经由 2 ,4—二硝基苯肼衍生化后 ,用氢焰离子化检测器测定的衍生气相色谱法
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  derivative gas chromatography
The problems of derivative gas chromatography of the alkanolamines have been discussed.
      


In this paper, new methods for separation and determination of principal species of trace arsenic in lake water and soils were proposed. In water sample, the suspended arsenic was separated by filtration with 0.45μm filter membrane, the colloidal form in the filtrate was adsorbed by activated carbon, and free form remained in the solution. The various valence states of arsenic in the colloidal and free states were separated by hydrosulphonyl cotton fiber (SCF) respectively. The soils were extracted with water,...

In this paper, new methods for separation and determination of principal species of trace arsenic in lake water and soils were proposed. In water sample, the suspended arsenic was separated by filtration with 0.45μm filter membrane, the colloidal form in the filtrate was adsorbed by activated carbon, and free form remained in the solution. The various valence states of arsenic in the colloidal and free states were separated by hydrosulphonyl cotton fiber (SCF) respectively. The soils were extracted with water, and then with diluted hydrochloric acid, then the resulting solutions were allowed to be filtrated through 0.45μm membrane, the filtrates were water - soluble and acid -soluble states, and acid - insoluble residue remained. The two formers were separated to the colloidal, free and various valence states by using the above method. The scheme and the methods for speci-ation analysis, and their reliability and optimum conditions were discussed. The various arsenic was determined by gas-liquid chromatography with 2,3-dimercaptopropanol (BAL) derivation.

提出了湖水和土壤中痕量砷的形态分类方案,研究备形态的分离与测定.水样以0.45μm膜过滤分离出悬浮态的砷,用活性炭分离砷的胶态与游离态;土壤样品依次用水、稀盐酸提取.0.45μm膜过滤,得到水溶态、酸溶态和残余态,前两者用活性炭方法分离胶态与游离态;以巯基棉纤维分离,二巯基丙醇衍生气相色谱法测定各形态的砷的总量及胶态与游离态中砷的价态、无机态和有机态,从而建立湖水和土壤中痕量砷的形态分析方法.

Residual bromide ion ( Br- ) in soil and cucutmber was determined by de- rivative gas liquid chromatography and methyl bromide adsorbed by soil was detected by fortified levels varying from o.4-40mg/kg.The RSDS ranged from ±2.5. to 14.7%The ha1f lives of Br- in soil and cucumber were 15.0 days and 14.2 days( Beijing) , 24.7 days and 10.3 day.(Shenyang) . The me- thyl bromide adsorbed by soil was wery small. lts half life Was the same as that of Br-. The application rate for garden fumigating at a dosage of...

Residual bromide ion ( Br- ) in soil and cucutmber was determined by de- rivative gas liquid chromatography and methyl bromide adsorbed by soil was detected by fortified levels varying from o.4-40mg/kg.The RSDS ranged from ±2.5. to 14.7%The ha1f lives of Br- in soil and cucumber were 15.0 days and 14.2 days( Beijing) , 24.7 days and 10.3 day.(Shenyang) . The me- thyl bromide adsorbed by soil was wery small. lts half life Was the same as that of Br-. The application rate for garden fumigating at a dosage of less than 75g/m2 may assure that the residual Br- in cucumber does not exceed MRL.

衍生气相色谱法测定了溴甲烷熏蒸大棚土壤后土壤及作物(黄瓜)中残留的Br-,用顶空法测定土壤吸附的溴甲烷。在0.4-40mg/kg的添加范围内,Br的平均回收率为83.7%-94.8%,相对标准偏差为±2.5%-14.7%。Br在土壤和黄瓜中的半衰期为15.0和14.2d(北京)、24.7和10.3d(沈阳)。土壤吸附的溴甲烷量较少,其半衰期和Br的嵪嘟5陀冢罚担埃纾恚驳氖┯眉亮靠杀Vせ乒现胁辛舻模拢虿怀畲蟛辛粝蘖勘曜肌

Formaldehyde in indoor air was collected by water, derivatized with 2,4 dinitrophenylhydrazine and extracted by cyclohexane. The sample was separated on an OV 17 and QF 1 mixed chromatographic column and determined by electron capture detector. The detection limit was 0.02mg/L(solution), the minimum detectable concentration was 0.01mg/m 3 while 10L indoor air was collected. The results show that this is a rapid and sensitive method with less interferences and fairly good precision. The recoveries were 71.0%...

Formaldehyde in indoor air was collected by water, derivatized with 2,4 dinitrophenylhydrazine and extracted by cyclohexane. The sample was separated on an OV 17 and QF 1 mixed chromatographic column and determined by electron capture detector. The detection limit was 0.02mg/L(solution), the minimum detectable concentration was 0.01mg/m 3 while 10L indoor air was collected. The results show that this is a rapid and sensitive method with less interferences and fairly good precision. The recoveries were 71.0% 90 4% and coefficients of variation were 4.1% 6.5%. The development of this method has made a reliable methodological foundation for the determination of formaldehyde in indoor air.

建立了测定居室空气中甲醛的衍生气相色谱法。方法的检测限为0.02mg/L(水溶液),当采气量为10L时,最低检出浓度为0.01mg/m3(居室空气),变异系数为4.1%~6.5%,回收率为71.0%~90.4%。

 
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