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痕量甲烷
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  trace methane
     It can analyze trace methane, carbon dioxide, oxygen, hydrogen, nitrogen and carbon monoxide in argon (99.9999%). The minimum detectable concentrations of these impurities are 0.02, 0.03, 0.06, 0.08, 0.3 and 0.4 ppm respectively.
     它可以检测纯度为6个“9”(99.9999%)的氩气中的痕量甲烷、二氧化碳、氧气、氢气、氮气和一氧化碳等六种杂质,最小检测浓度分别为0.02,0.03、0.06、0.08,0.3和0.4ppm。
短句来源
     DETERMINATION OF TRACE METHANE IN ATMOSPHERES OF ACID RAIN REGION BY GC-MS
     西南酸雨地区大气中痕量甲烷的测定
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  “痕量甲烷”译为未确定词的双语例句
     A novel furnace for catalytic oxidation of both high concentration CH4.And trace CH4 was developed by using a new noble metal catalyst working at lower tempera ture(500℃).
     介绍一种用钯基催化剂制成的新型甲烷催化转化炉,适用于高浓度甲烷和痕量甲烷的氧化过程,工作温度400~500℃。
短句来源
  相似匹配句对
     DETERMINATION OF TRACE METHANE IN ATMOSPHERES OF ACID RAIN REGION BY GC-MS
     西南酸雨地区大气中痕量甲烷的测定
短句来源
     trace analysis;
     痕量分析;
短句来源
     Spectrophotometric Determination of Trace Amounts of Vanadium in Steels with Diantipyrylvinyphenymethane(DAVPM)
     二安替比林苯乙烯基甲烷光度法测定钢铁中的痕量
短句来源
     Analytical Methods of Trace Lead
     铅的痕量分析技术
短句来源
     An Ogticai Fiber Based Telemetering System for Methane
     甲烷光纤遥测系统
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  trace methane
The δ13C values of trace methane emitted from rice paddies in Guizhou Province range from -64.5‰ to -54.
      
Recently we introduced another CRDS device that measures trace methane with a lower detection limit of less than 2 ppb.
      


A two column, two valve high purity argon analyzer with a sensitive argon ionization detector has been developed. It can analyze trace methane, carbon dioxide, oxygen, hydrogen, nitrogen and carbon monoxide in argon (99.9999%). The minimum detectable concentrations of these impurities are 0.02, 0.03, 0.06, 0.08, 0.3 and 0.4 ppm respectively. The total analysis time, including valve switching time, is less than 10 minutes. One column is packed with molecular sieve, the other with Porapak Q. The detector uses...

A two column, two valve high purity argon analyzer with a sensitive argon ionization detector has been developed. It can analyze trace methane, carbon dioxide, oxygen, hydrogen, nitrogen and carbon monoxide in argon (99.9999%). The minimum detectable concentrations of these impurities are 0.02, 0.03, 0.06, 0.08, 0.3 and 0.4 ppm respectively. The total analysis time, including valve switching time, is less than 10 minutes. One column is packed with molecular sieve, the other with Porapak Q. The detector uses ~(63)Ni radiation source improved with organic modifiers. The instruments is suitable for cylinder argon analysis and argon production on-line analysis.

研制了一台带双柱、双阀和高灵敏度氩离子化检测器的高纯度氩气纯度分析仪。它可以检测纯度为6个“9”(99.9999%)的氩气中的痕量甲烷、二氧化碳、氧气、氢气、氮气和一氧化碳等六种杂质,最小检测浓度分别为0.02,0.03、0.06、0.08,0.3和0.4ppm。总分析时间,包括阀切换时间在内,不超过十分钟。两根色谱柱分别装改性分子筛和Porapak Q担体。检测器采用Ni~(63)放射源,并用有机改性剂进行改进。该仪器适用于分析钢瓶氩气和氩气生产在线分析。

Determination of methane in air has been studied by GC-MS. The detection limit of CH4 could get to 10PPb. Trace methane in atmosphere of Chongqing and Guiyang region has been determined.

本文使用GC-MS仪对大气中甲烷的分离分析进行了最佳条件的研究,并对重庆与贵阳酸雨地区大气中痕量甲烷进行了测定。

A novel furnace for catalytic oxidation of both high concentration CH4.And trace CH4 was developed by using a new noble metal catalyst working at lower tempera ture(500℃).In comparison with conventional CuO-Pt furnace,it characterized in hold ing high CH4 catalytic oxidation ratio,lower energy comsumption and more pratical properties.

介绍一种用钯基催化剂制成的新型甲烷催化转化炉,适用于高浓度甲烷和痕量甲烷的氧化过程,工作温度400~500℃。与传统的CuO-Pt燃烧炉相比,具有催化效率高,省能,方便实用等特点。

 
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