test method
Add a certain amount of copper and nickel standard solution to 10ml colorimetric tube, and then add 2.0ml buffer solution CPB 1.0ml in turn.
TritonX- 100 1.0ml, 5-Br-PADN 1.2ml, dilute to scale with water, prepare reagent blank by the same method, shake well for 20min, and add water to mix well.
Pour about 3.0ml of chromogenic solution into a 1cm cuvette, measure the absorbance A Ⅰ at the wavelength of 547nm with distilled water as reference, and add three drops of ethylenediamine.
In a cuvette, mix well for 2 minutes, and measure the absorbance A Ⅱ at the same wavelength, then ANI = A Ⅱ-A Ⅱ is empty, and ACU = (A Ⅰ-A Ⅱ)-(A Ⅰ is empty.
-One II II is empty).
Quoted from "Continuous and Rapid Determination of Copper and Nickel in Cast Iron"
The 72 1 spectrophotometer is used in the literature, but the 722 spectrophotometer is also universal ... you can rest assured of this. ...
In addition, the detection method of molybdenum is quoted from Determination of Trace Molybdenum, Tin and Antimony in Cast Iron by Chemometrics Computational Spectrophotometry.
Because it's in PDF format, it can't be put on the web page ... if you need it, please give me your email address. I'll send it to you. ...