97中文字幕在线精品视频_免费无码不卡的视频_美女黄18以下禁止使观看视频_国产亚洲欧美在线人成aaaa

產(chǎn)品詳細(xì)介紹

CUAR-1陽極銅成分分析標(biāo)準(zhǔn)物質(zhì)Copper Anodes

Table 1 – CUAR-1 Certified Values
Element   Unit    Mean  Within-lab Standard Deviation Between-labs Standard Deviation Extended standard uncertainty at 95% confidence
Ag μg/g 294 6 10 ±  7
As μg/g 145 9 15 ± 18
Au μg/g 2.3 0.3 0.4 ± 0.3
Fe μg/g 76 4 13 ±  4
Pb μg/g 864 35 68 ± 36
Sn μg/g 113 22 24 ± 17
Te μg/g 33 4 7 ±  4
 
Table 2 – CUAR-1 Provisional Values
Element Unit   Mean  Within-lab Standard Deviation Between-labs Standard Deviation 95% Confidence Interval
Bi μg/g 83 4 12 ±   4
Ni μg/g 4,109 64 434 ± 611
Sb μg/g 798 34 156 ±  56
Se μg/g 26 4 25 ±   4
 
Table 3 – CUAR-1 Informational Values
Element Unit   Mean  Standard Deviation No. of Values
Cu % 98.6 0.1 15
Zn μg/g 32 4 15
Source
CUAR-1 is a copper anode donated by Asarco in Amarillo, Texas, USA in January 1994.
Description
The material is in the form of drillings and contains approximately 98% copper plus several elements at trace levels.
Intended use
CUAR-1 is suitable for the analysis of elements at trace levels.  Examples of intended use are for quality control in the analysis of samples of a similar type, method development and arbitration.