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national standard samples
相关语句
  国家标准样品
     After analyzing with the national standard samples, the results show that the relative deviation is less than 1.3%, recovery ratio is between 99.6% and 99.8%.
     经对国家标准样品进行分析,相对偏差≤1.3%,回收率99.6~99.8%。
短句来源
     The article was discussed that national standard samples acted importantly on magnitude headward of air automatic monitoring system.
     阐述了国家标准样品在空气自监测系统量值溯源中的重要作用。
短句来源
     The determination method was verified by the national standard samples with a satisfactory result. The determination error is less than 5%.
     该方法采用国家标准样品验证,结果令人满意,10次测定精密度小于5 %。
短句来源
  “national standard samples”译为未确定词的双语例句
     Through analyzing with the national standard samples, the results show that the relative deviation is 0.53%, recovery ratio is between98.8% and 101%.
     经对标准样品进行分析,相对标准偏差0.53%,标准加入回收率98.8~101%。
短句来源
     The detection limit is 0.08×10 -9 (10?g of sample) for gold with detection range of 1.0×10 -9 to 20×10 -6 . The method has been applied to the determination of trace gold in the national standard samples.
     方法检出限为 0 .0 8× 1 0 -9(1 0g样品 ) ,测定范围在 1~ 2 0 0 0 0ng内P -logC呈线性关系。
短句来源
     Measured values of Molybdenum in national standard samples GSS-5 and GSR-1 using the above-mentioned method were in good agreement with recommended values. The filter fiber column coated with phenyl fluorone was extended to pre-concentrate trace amount of Indium. The optimized enrichment condition wasachieved when the pregnant solution at pH = 5 flowed through the filter fiber column at the rate of less than 2.0 mL/min.
     pH=2的待富集液,以流速2.0mL/min过柱,Mo(Ⅵ)被定量富集,以1.0mL/min流速的2.00mL 3%氨水可以将Mo(Ⅵ)完全洗脱。
短句来源
     Then through progressive approximatim,mi-nus area of background and influence of other neighboring elements,the exact area of cobalt can begot,a group of national standard samples are measured , and using linear regression method getsS_(meth)=0.024%.
     通过测量一组国家标样。 使用线性回归方法使均方误差S_(meth)=0.024%。
短句来源
     Its precision and accuracy were approved of to be 15.0% and 12% respectively by national standard samples and daily supervision. This method could meet the analytical needs of geochemical samples.
     经国标样检验、日常分析监控,其准确度为15 .0 % 、精密度为12 % ,满足了化探痕量金分析误差要求。
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  相似匹配句对
     New National Standard
     新颁布的国家标准
短句来源
     New National Standard
     新颁布的交通行业标准
短句来源
     Standard
     标准
短句来源
     Which is the standard?
     采用什么标准评价?
短句来源
     The samples were amorphous.
     样品均为无定形结构。
短句来源
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Themeasurement of cobalt in ocean manganese-iron nodule is discussed.First, adopt the integralmethod to define the range of cobalt accurate to decima. Then through progressive approximatim,mi-nus area of background and influence of other neighboring elements,the exact area of cobalt can begot,a group of national standard samples are measured , and using linear regression method getsS_(meth)=0.024%.

研究铁锰结核矿中Co元素的测定方法。首先,采用积分方法,确定Co元素的分析区间,精确到小数位。其次,通过逐次逼近,扣除本底面积和其它相邻元素的相互影响,求出Co元素的净面积。通过测量一组国家标样。使用线性回归方法使均方误差S_(meth)=0.024%。

The precision and stability of gold determination were improved with the concave electrode used as a top electrode and Be0+Zn0+graphite powder as a buffer. After the testing on adsorption of impurity by polyfoam and adsorption conditions, the ideal working condition was determined for the analytical instrument. Its precision and accuracy were approved of to be 15.0% and 12% respectively by national standard samples and daily supervision. This method could meet the analytical needs of geochemical samples....

The precision and stability of gold determination were improved with the concave electrode used as a top electrode and Be0+Zn0+graphite powder as a buffer. After the testing on adsorption of impurity by polyfoam and adsorption conditions, the ideal working condition was determined for the analytical instrument. Its precision and accuracy were approved of to be 15.0% and 12% respectively by national standard samples and daily supervision. This method could meet the analytical needs of geochemical samples.

采用凹电极为上电极、BeO+ ZnO+ 石墨碳粉为缓冲剂提高了金分析的灵敏度和稳定性。对泡沫塑料吸附中杂质、吸附条件等进行试验,选择了较好的仪器及工作条件。经国标样检验、日常分析监控,其准确度为15 .0 % 、精密度为12 % ,满足了化探痕量金分析误差要求。

A new method for the determination of trace niobium and tantalum in soil and geochemical exploration samples by inductively coupled plasma atomic emission spectrometry with solvent extraction flow injection was proposed.The niobium and tantalum were extracted with the mixed solvent of MIBK and TBP at 1 mol·L -1 HF and 4 mol·L -1 H 2SO 4.Experiment conditions and manifold parameters were investigated in detail.The detection limits were 0 5×10 -12 g·L -1 and 0 8×10 -12 g·L -1 .The...

A new method for the determination of trace niobium and tantalum in soil and geochemical exploration samples by inductively coupled plasma atomic emission spectrometry with solvent extraction flow injection was proposed.The niobium and tantalum were extracted with the mixed solvent of MIBK and TBP at 1 mol·L -1 HF and 4 mol·L -1 H 2SO 4.Experiment conditions and manifold parameters were investigated in detail.The detection limits were 0 5×10 -12 g·L -1 and 0 8×10 -12 g·L -1 .The proposed method was rapid,simple and accurate,it has been applied to the determination of trace niobium and tantalum in national standard samples.The results were in good agreement with certified values with precisions of 4 5% and 5 1% RSD (n=10).The sample throughput for niobium and tantalum is 20·h -1 .

应用流动注射在线萃取技术将Nb ,Ta萃入甲基异丁酮 (MIBK)和磷酸三丁脂 (TBP)混合溶剂直接进行ICP AES测定。研究了流动注射在线萃取 电感耦合等离子体原子发射光谱法测定土壤和化探样品中Nb和Ta的实验条件、流路参数、酸度条件的选择 ,考察了共存元素的干扰。采样速率为 2 0样·h-1,RSD(n=10 )为Nb 4 5 % ;Ta 5 1% ,测定检出限 (K =3 )为Nb 0 5ng·mL-1;Ta 0 8ng·mL-1。方法操作简便、快速 ,经对国家一级标准物质分析 ,结果与推荐值一致。

 
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