镍标液,500ML, Nickel solution 1000 ppm

D751 大孔苯乙烯系螯合型离子交换树脂, Amberlite× IRC-748

邻苯二硫醇, 1,2-Benzenedithiol

3,4-二羟基苯甲醛, 3,4-Dihydroxybenzaldehyde

邻苯二甲酸氢钾, Potassium Hydrogen Phthalate

甲氧基环戊烷, Cyclopentyl methyl ether

失水山梨醇聚氧乙烯, TWEEN 20 500ML

磷酸二氢钾, Potassium dihydrogen orthophosphate

碳酸铵,250GR, Ammonium carbonate

硫酸盐标准溶液, Sulfate standard solution 1000 ppm