標(biāo)準(zhǔn)編號(hào):	GB 7472-1987
中文名稱(chēng):	水質(zhì) 鋅的測(cè)定 雙硫腙分光光度法
英文名稱(chēng):	Water quality - Determination of zinc - Spectrophotometric method with dithizone
中標(biāo)分類(lèi):	Z16    水環(huán)境有毒物質(zhì)分析方法
行業(yè)分類(lèi):	GB    國(guó)家標(biāo)準(zhǔn)
ICS分類(lèi):	13.060 13.060     13.060
發(fā)布機(jī)構(gòu):	國(guó)家質(zhì)量監(jiān)督檢驗(yàn)檢疫總局
發(fā)布日期:	1987-3-6
實(shí)施日期:	1987-8-1
標(biāo)準(zhǔn)狀態(tài):	valid
翻譯語(yǔ)言:	英文
文件格式:	PDF
中文字符數(shù):	6000 字
翻譯價(jià)格(元):	240.0
交付時(shí)間:	付款后 1 個(gè)工作日

1 Application Scope 1.1 Determination substance: this standard specifies determination of zinc in water by spectrophotometric method with dithizone. 1.2 Sample type: this method is applicable to determination of trace zinc in natural water and some waste water. Relevant interference problems are detailed in Appendix A. 1.3 Scope: this method is applicable to determine water sample with zinc concentration of 5~50μg/L. 1.4 Detection limit: when the cuvette with optical path length of 20mm is used and the volume of the test portion is 100ml, the detection limit is 5μg/L. 1.5 Sensitivity: in this method, carbon tetrachloride is used for extraction, when the measurement is carried out at the maximum light absorption wave length of 535nm, the molar absorbance is about 9.3×104L/mol?cm. 2 Definition As specified in this standard, total zinc content in the water sample shall be determined after the water sample is subject to acid digestion treatment.

Contents 1 Application Scope 2 Definition 3 Principle 4 Reagent 5 Apparatus 6 Sampling and Sample 7 Procedures 8 Expression of Results 9 Precision and Accuracy Appendix A (Supplement) Interference and Its Elimination Additional Explanation