【摘要】 在pH=4.7的六次甲基四胺缓冲介质中钒(Ⅳ)与依来铬青R、CPB形成蓝紫色的三元配合物,其组成为1∶3∶3,λmax=590nm,表观摩尔吸光系数为4.0×104L/mol·cm,钒在0～25μg/25mL范围内遵守比耳定律,用于钢中钒的测定,结果准确可靠。更多还原

【Abstract】 In the hexamethylene tetramine buf fer solution(pH4.7),vanadium(Ⅳ)reacts with iriochrome cyamine R and CPB to form a 1∶3:3blue -violet complex.The maxinum a bsorption is at 590nm and the molar ab sorptivity is4.0×104L·mol-1·cm-1.Beer’ s law is obeyed in the range of 0～25μg /mL for vanadium.The method has been applied to the determination of vanadium in steel with satisfactory resu lts.更多还原