摘要
样品经盐酸溶解后,加热煮沸20分钟,母液定容到100毫升容量瓶。分取20毫升母液到锥瓶中,经三乙醇胺掩蔽,氢氧化钾调p H至12－13后,加少许钙黄绿素-酚酞络合剂混合指示剂,用EDTA标准溶液进行滴定。
The samples were dissolved in hydrochloric acid, boiled for 20 minutes, and then the mother liquor was constant to the 100 m L flask. And moved 20 m L volume of mother liquor into the conical bottle, added with triethanolamine and potassium hydroxide for p H adjustment to 12~13 and a little calcein biotin phenolphthalexone mixed indicator, then titrated using EDTA standard solution.
出处
《广东化工》
CAS
2016年第3期114-114,118,共2页
Guangdong Chemical Industry
