基准物质,Standard Substance
1)Standard Substance基准物质
1.Determination of Sulfur in Silicon byStandard Substance Combustion Infrared Absorption;基准物质燃烧红外吸收法测定硅中硫
2)Standard substance(BaCO 3)基准物质(BaCO)
3)secondary reference material工作基准物质
1.0460)%(k=2)respectively when measured by certified andsecondary reference material.实验中应用有证二级标准物质级与工作基准物质级氯化钠对硝酸银标准溶液进行定值。
4)sediments quality criteria沉积物质量基准
1.Propersediments quality criteria(SQC),therefore, are required to indicate the contamination situation.因此,需要制定沉积物质量基准(SQC),以此作为评价沉积物污染及其生态效应的基础。
英文短句/例句
1.Application of Equilibrium Partitioning Approach to Derive Sediment Quality Criteria for Heavy Metals应用相平衡分配法建立污染物的沉积物质量基准
2.Study on Marine Sediment Quality Criteria for PAHs;海洋沉积物中多环芳烃质量基准研究
3.A river kind of sediment Certified Reference Material( CRM) based on natural-matrix for environmental radioactivity has been developed.研制出一种天然基质的河流沉积物环境放射性标准物质。
4.Preparation of Five China Sea and Continental Shelf Sediment Reference Materials with Ultra Fine Particle Size中国海大陆架沉积物超细标准物质系列研制
5.A review on the reference material series for China Sea and continental shelf sediments中国海及大陆架沉积物标准物质系列评介
6.When deposited, 70-80% of the volume of muddy sediments may be water.泥质沉积物沉积后，体积的70-80％是水。
7.Impact of sorption and desorption behaviors of lindane on its sediment quality criteria林丹的吸附解吸行为对其沉积物基准的影响
8.Deposition is the laying down of sediment that has been transported.沉积是已搬运的物质再沉积下来。
9.The "spikes" seen with the silver stain represent the intervening matrix of basement membrane between the deposits.银染所见的“钉突”是沉积物之间的基膜样物质。
10.Determination of Arsenic in National Standard Reference Soil and Stream Sediment Samples by Atomic Fluorescence Spectrometry原子荧光光谱法测定土壤和水系沉积物国家标准物质中砷
11.Direct coat a version of the roll coating process where the applicator roll revolves in the same direction as the travel of the strip.沉积量(涂布量)化学转化膜或其它物质在金属前处理过程中的沉积量。
12.Material balance analysis based on sulfur deposition for closed sulfur-bearing gas reservoir基于硫沉积的含硫封闭气藏物质平衡分析
13.DATA PROCESSING TECHNIQUE FOR DUAL-PROBE HEAT-PULSE METHOD TO DETERMINE THERMAL CONDUCTIVITY OF MARINE SEDIMENTS基于DPHP技术测量沉积物热导率的数据处理
14.Tectono-Sedimentary Evolution and Its Controls on Basic Petroleum Geological Condition of South Margin of Junggar;准噶尔南缘构造沉积演化及其控制下的基本油气地质条件
15.The matrix of bone contains both fibers of the protein collagen and mineral deposits.硬骨的基质既含有蛋白质的胶原纤维，也含有矿物质沉积。
16.Research on the Geochemical Feature and Contamination Assessment for Trace Metals in the Sediments from Zhejiang Offshore;浙江近岸海域沉积物中痕量金属地球化学特征及环境质量评价
17.Distribution and environment quality evaluation on heavy metals in surface sediments of Pearl River Estuary珠江口海域表层沉积物中重金属含量分布特征及其环境质量评价
18.Pollutant Distribution and Risk Based Evaluation of Municipal Canal Sediment;城市河道沉积物中污染物分布及环境质量风险评估
相关短句/例句
Standard substance(BaCO 3)基准物质(BaCO)
3)secondary reference material工作基准物质
1.0460)%(k=2)respectively when measured by certified andsecondary reference material.实验中应用有证二级标准物质级与工作基准物质级氯化钠对硝酸银标准溶液进行定值。
4)sediments quality criteria沉积物质量基准
1.Propersediments quality criteria(SQC),therefore, are required to indicate the contamination situation.因此,需要制定沉积物质量基准(SQC),以此作为评价沉积物污染及其生态效应的基础。
5)sediment quality guidelines沉积物质量基准
1.The ecotoxicity of the extracted liquor and whole sediment in Wulihu Lake before and after dredging were studied and analyzed, adopting the freshwatersediment quality guidelines and the microbial toxicity test technique.采用淡水沉积物质量基准和微生物毒性试验方法,对疏浚前后五里湖沉积物提取液和全底泥沉积物的生态毒性进行了研究与分析。
6)sediment quality criteria沉积物质量基准
1.The new advances of deriving the aquaticsediment quality criteria for heavy metals is reviewed according to the newest information on developingsediment quality criteria in Canada, Florida (USA), Australia, New Zealand, British, the Netherlands and Hong Kong Special Administrative Region.利用20世纪90年代以来加拿大、美国佛罗里达、澳大利亚、新西兰、英国、荷兰及中国香港等国家和地区水体沉积物质量基准研究的最新资料,综述了建立水体沉积物重金属质量基准的方法研究新进展,重点介绍了目前国际上广泛采用的用于制定沉积物质量基准的两种方法—基于生物效应数据库的响应型阈值法(生物效应数据库法)和基于分配模型的相平衡分配法。
2.Thesediment quality criteria(SQC) development efforts have been undertaken mainly by the United States Environmental Protetion Agency for the assessment of environment impact of sediment-associated pollutants in the latest decade.本文综述了沉积物质量基准的最新进展。
3.An Equilibrium Partitioning(EqP) approach was used to derive thesediment quality criteria(SQC) values for heavy metals such as cadmium(Cd),copper(Cu),arsenic(As),mercury(Hg) and two organic chlorine pesticides(DDT,HCH) in a sewage reservoir located in Tianjin.以污染较为严重的天津某污水库的表层沉积物为对象,应用热力学相平衡分配(EqP)法,初步探讨了该水体沉积物中4种重金属(Cd,Cu,As,Hg)和2种有机氯农药〔滴滴涕(DDT)、六六六(HCH)〕的沉积物质量基准(SQC)推荐值。
延伸阅读
基准物质基准物质standardchemicals用以直接配制标准溶液的物质，或用以标定容量分析中的标准溶液的物质。又称标准物质。标准溶液是一种已知准确浓度的溶液，可在容量分析中作滴定剂，也可在仪器分析中用以制作校正曲线的试样。基准物质应该符合以下要求：①组成与它的化学式严格相符。②纯度足够高。③应该很稳定。④参加反应时，按反应式定量地进行，不发生副反应。⑤最好有较大的式量，在配制标准溶液时可以称取较多的量，以减少称量误差。常用的基准物质有银、铜、锌、铝、铁等纯金属及氧化物、重铬酸钾、碳酸钾、氯化钠、邻苯二甲酸氢钾、草酸、硼砂等纯化合物。20世纪50年代以后，不少人考虑到电量（库仑数）可以准确测量，建议用库仑作为一种实用的基准物质，代替一些纯的化学试剂。
