Commonly used method for measuring high levels of copper is still the old iodimetry its large amount of potassium iodide, high cost, time consuming, and the newly developed spectrophotometric problem because copper reagent should not be the determination of high copper content Therefore it is necessary to research and develop new chromogenic reagent. The authors try acetic acid - sodium acetate buffer solution, pH control, as chromogenic reagent with ethylene diamine tetra-acetic acid disodium salt (EDTA), the determination of copper powder of high copper content, while taking advantage of EDTA masking zinc, aluminum and other elements eliminate the interference. Cu ^ 2 + generation and EDTA molar ratio of 1: 1 blue complex, the complex maximum absorption wavelength 2 = 730nm domestic copper powder brands, the molar extinction coefficient of ε = 88.9, copper ion content in 12 within -24mg / 50mL showed a good linear relationship, the linear regression equation is A = 0.0354 + 0.02317c, the linear correlation coefficient R = 0.9995. EDTA using spectrophotometric determination of copper powder of high copper content of domestic copper powder, the result is satisfactory bottled domestic copper powder, there is the development and application prospects, especially for the equipment is relatively simple, and small businesses laboratory. Metal complex dyes, also known as transparent dye, commonly known as color fine or toner, you can use a solvent to dissolve the dye-made bronze powder suppliers, compatibility with various resins are also very good, so its wide range of applications. Product features: Because of its specificity complexed metal complex dyes different from the general structure of traditional organic pigments and dyes, so that it has a higher gloss and transparency, better weather and more fastness; compared with inorganic pigments, metal complex dyes have easily dispersed, easy penetration, easy to color, colorful, good transparency properties. Including solvent-refined color, water color fine oil gender, water Xingse fine. Domestic copper powder supplier | Danyang domestic copper powder | Pengfei preferred pigment prices offered by Yiwu Pengfei pigments Limited. Yiwu Pengfei Pigment Co., Ltd. (www.1688.com/company/ywpfyl.html) strong, credible, Jinhua in Zhejiang organic pigment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving Pengfei innovative ideas will lead you hand into the brilliant pigment and a better future!