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铜的比色测定法很多,作为比色试剂的有打萨宗、二乙基——二硫代氨基甲酸钠、氨、亚铁氰化钾、乙基黄酸钾、吡唍与硫氰酸盐、水杨酸、苯甲氨脲等.这些方法的共同点是大多需要严格的控制各种条件,如溶液的PH值、试剂的用量,现色温度、放置时间等;并且干扰的离子也很多,对于复杂物质的分析,往往事前需作繁复的分离手续。“特利隆A”(“TPNAOH A”,即氮三乙酸的二钠盐(与Cu~艹迅速地生成稳定的蓝色络合物,与未加“特别隆A”的铜溶液比较,颜色大大地加深,这就有可能用“特利隆A”作为Cu~艹的比色
Copper colorimetric determination of many, as a colorimetric reagents have aza, diethyl - dithiocarbamate, ammonia, potassium ferrocyanide, ethyl potassium, potassium pyrrole and thiocyanate , Salicylic acid, benzoic urea, etc. These methods have in common is that most of the need to strictly control a variety of conditions, such as the PH value of the solution, reagent dosage, color temperature, storage time, etc .; and interference ions are also many For the analysis of complex substances, often need to make complicated separation procedures in advance. “TPNAOH A” (ie, the disodium salt of nitrilotriacetic acid (which rapidly forms a stable blue complex with Cu ?, compared with Cu solution without “Teutron A”), has a significantly larger color Deepening, it is possible to use “Trilon A” as Cu ~ 比 colorimetric