【摘要】 用乙醇-乙酸及过氧化氢还原Cr6+来消除对测定氯离子的干扰,用柠檬酸二钠掩蔽Fe3+和Cu2+等离子,用氯离子选择电极,通过多次标准添加作图法测定镀铬液中的氯离子.该法相对标准偏差小于2%,加料回收率为96%~104%,可测定氯离子最低含量为0.2 mg/L.更多还原

【Abstract】 Chloride in chrome-platting solution was determined by the standard addition method with the chloride ion selective electrode.The interference of chromate can be eliminated by the ethanol-acetic acid-hydrogen peroxide system.The proposed procedure is simple and rapid;the relative standard deviation of which is less than 2.0% and the standard addition recovery 96%-104%.The content of chloride ion for determination is as low as 0.2 mg/L.更多还原