1.
Preparation of Nitrogen Tetroxide Minim Water Reference Material and Study of Homogeneity and Stability
四氧化二氮微量水标准物质的制备及其均匀性稳定性研究
2.
PREPARATION OF MICRO-OXYGEN IN NITROGEN CALIBRATION GASES BY GRAVIMETRIC METHOD
重量法制备氮中微量氧气体标准物质
3.
The Stability of Micro-Carbonyl Sulfide in Carbon Dioxide
二氧化碳中微量氧硫化碳标准气体的稳定性
4.
In 2001, the annual average of NO2 concentration in the air of 341 cities attained the Grade II national standards for air quality.
2001年，341个城市空气中二氧化氮浓度年均值均达到国家环境空气质量二级标准。
5.
The Recovery of Detecting Nitrogen Oxide in Atmesphere and Quality Control;
大气监测中氮氧化物加标回收与质量控制
6.
Evaluation of Uncertainty of Measurement for Determination of Equivalent Water Content in Nitrogen Tetroxide by NMR Method
核磁共振法测定四氧化二氮中相当水含量测量不确定度评定
7.
determination of the mass concentration of sulphur dioxide [tetrachloromercurate (tcm)/pararosaniline method]
二氧化硫质量浓度的测定-四氯汞化物/副品红法
8.
NMRS Determination of Equivalent Water Content in Nitrogen Tetroxide
核磁共振波谱法测定四氧化二氮中的相当水含量
9.
Development on Mixed Gas Reference Material of Carbon Monoxide,Carbon Dioxide And Ethyne in Ethylene
乙烯中一氧化碳、二氧化碳和乙炔混合气体标准物质的研制
10.
CHAPTER II ESTABLISHMENT OF STANDARDS FOR WATER ENVIRONMENT QUALITY AND FOR DISCHARGE OF WATER POLLUTANTS
第二章 水环境质量标准和污染物排放标准的制定
11.
Air quality--Determination of nitrogen oxides in ambient air--Griess-saltzman method
GB/T8969-1988空气质量氮氧化物的测定盐酸萘乙二胺比色法
12.
stationary source emissions-determination of the mass concentration of nitrogen oxides (naphthylethylenediamine photometric method)
固定源辐射-氮氧化合物质量浓度的测定-萘二胺光度测定法
13.
Biochemical oxygen demand - BOD: A measure of the amount of pollution by organic substances in water.
生化物需氧量(简写为 BOD):一种衡量有机物在水中的污染量的标准。
14.
Air quality--Determination of nitrogen oxides
GB/T13906-1992空气质量氮氧化物的测定
15.
Control Standards, Policy Analysis and Research on Nitrogen Oxides in Thermal Power Plants
火电厂氮氧化物控制标准、政策分析及研究
16.
Study on Benzene in Carbon Dioxide Standard Gas as Food Additives
食品添加剂二氧化碳中苯系列气体标准物质的研究
17.
Study on The Performance Evaluation of Benzene in Carbon Dioxide Standard Gas as Food Additives
食品添加剂二氧化碳中苯气体标准物质性能评价方法的研究
18.
The Quality Assessment of Gas Standard Materials of Carbon Monoxide And Methane in The Field of Environmental Monitoring
环境监测领域一氧化碳、甲烷气体标准物质质量的评估