化工时刊
化工時刊
화공시간
CHEMICAL INDUSTRY TIMES
2014年
10期
33-35,46
,共4页
剩余EDTA%显色剂%缓冲液%标准滴定
剩餘EDTA%顯色劑%緩遲液%標準滴定
잉여EDTA%현색제%완충액%표준적정
residual EDTA%color-developing reagent%buffer%standard titration
结合EDTA清洗锅炉的原理，考虑清洗液中主要的金属元素，配置了模拟清洗液，试验测定了ZnCl2、CaCl2两种标准滴定溶液与酸铬兰K等3种显色剂的相互搭配时的滴定结果，发现在pH=10的NH3-NH4 CL缓冲液中，以酸性铬蓝K为指示剂，以ZnCl2标准滴定溶液进行滴定的清洗液中EDTA含量，其结果误差较小，是一种能够准确判断EDTA清洗锅炉过程中其剩余浓度的检测方法。
結閤EDTA清洗鍋爐的原理，攷慮清洗液中主要的金屬元素，配置瞭模擬清洗液，試驗測定瞭ZnCl2、CaCl2兩種標準滴定溶液與痠鉻蘭K等3種顯色劑的相互搭配時的滴定結果，髮現在pH=10的NH3-NH4 CL緩遲液中，以痠性鉻藍K為指示劑，以ZnCl2標準滴定溶液進行滴定的清洗液中EDTA含量，其結果誤差較小，是一種能夠準確判斷EDTA清洗鍋爐過程中其剩餘濃度的檢測方法。
결합EDTA청세과로적원리，고필청세액중주요적금속원소，배치료모의청세액，시험측정료ZnCl2、CaCl2량충표준적정용액여산락란K등3충현색제적상호탑배시적적정결과，발현재pH=10적NH3-NH4 CL완충액중，이산성락람K위지시제，이ZnCl2표준적정용액진행적정적청세액중EDTA함량，기결과오차교소，시일충능구준학판단EDTA청세과로과정중기잉여농도적검측방법。
Recent years, Ethylenediamine tetraacetic acid ( EDTA) , as a chlorine-free chemical cleaning a-gent, with good cleaning effect, safety and environmental protection, clean short duration, attracted more and more attention. And determination of its residual concentration is important for cleaning process. In this paper, the cleaning solution is prepared in terms with the principle of EDTA boiler cleaning. And tests are made with two standard titra-tion solution ZnCl2/CaCl2 and three kinds of color-developing reagent, and found that PH=10, acid chrome blue K for the indicator and ZnCl2 as standard titration solution are the best combination with most accurate titration results.
