標(biāo)準(zhǔn)編號(hào):	GB 7470-1987
中文名稱:	水質(zhì) 鉛的測(cè)定 雙硫腙分光光度法
英文名稱:	quality - Determination of lead - Spectrophotometric method with dithizone
中標(biāo)分類:	Z16    水環(huán)境有毒物質(zhì)分析方法
行業(yè)分類:	GB    國(guó)家標(biāo)準(zhǔn)
ICS分類:	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):	420.0
交付時(shí)間:	付款后 1 個(gè)工作日

1 Application Scope This standard is applicable to the determination of trace of lead in the natural water and waste water, the concentration of lead is between 0.01~0.30mg/L. When the concentration is greater than 0.30mg/L, the determination may be carried out after the proper dilution of the sample. 1.1 Detection limit: when the cuvette with 10mm optical path length is used, the volume of the test portion is 100mL, the 10mL dithizone is used for extraction, the minimum detectable concentration may be 0.010mg/L. 1.2 Sensitivity: the carbon tetrachloride is used for extraction, when the measurement is carried out under the maximum light absorption wave length of 510nm, the molar absorption coefficient is about6.7×104L/mol?cm. 2 Definitions The total lead in the water sample is determined after the acid decomposition in the standard.

Contents 1 Application Scope 2 Definitions 3 Principle 4 Reagents 5 Apparatus 6 Sampling and Sample 7 Procedure 8 Expression of Result 9 Precision and Accuracy Additional Explanation