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畜牧人

標題: 關于飼料中鈣的快速檢測的問題 [打印本頁]
作者: elva_02    時間: 2011-3-22 16:02
標題: 關于飼料中鈣的快速檢測的問題
國標中乙二胺四乙酸二鈉絡合滴定法中說滴定時是在黑色背景下立即用EDTA標準滴定溶液至綠色熒光消失呈現紫紅色為滴定終點，請問這個終點到底是怎么確定呢？在實際操作感覺綠色熒光不是消失的很徹底啊！請高手幫助回答一下，謝謝
作者: wgysy    時間: 2011-3-22 16:03
誤差挺大的啊



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