Research methods about standard samples of water quality determination of Kjeldahl nitrogen were put forward. 提出了水质凯氏氮标准样品的研究方法。
We have determined tin and lead contents in tin solder using the XRF fundamental parameter method without standard sample in this paper. 本文在无标样的情况下,用X射线荧光基本参数法测定了焊锡中的锡和铅的含量。
The paper introduces preparation status of water dinitrotoluene environmental standard sample in environmental monitoring of water and wastewater. 报道了水和废水环境监测所用水质二硝基甲苯环境标准样品的研制情况。
The authors tested the micro-hardness value of a standard sample in HV5 micro-hardness apparatus using Vickers's indenter and Knoop's indenter with lode of 4.9N, 19.6N, 29.4N respectively. 摘要本文采用维氏压头和努普压头施加4.