生物染色劑與指示劑的區别_平博电竞

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平博电竞

廣州偉伯科技有限公司
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生物染色劑與指示劑的區别
2019.10.22   點擊1490次

生物染色劑是利用加入對細胞中特殊物質(如DNA,蛋白質,脂質,糖類等)具有選擇性的染劑,以此區别特殊物質。指示劑是一類在其特定的PH值範圍内,随溶液PH值改變而變色的化合物,通常是有機弱酸或有機弱堿。

在化學試劑中,把帶有顔色或可改變顔色的一類試劑統稱為色素試劑,它包括了指示劑、顯色劑和染色劑。

酸堿指示劑是遇到酸、堿能改變試劑顔色的指示劑,主要用來指示溶液的PH值,指示酸堿滴定的終點,如:考馬斯亮蘭等,這些試劑有的需直接合成,有的可從工業染料中提純制備。如次甲基蘭,染料次甲基蘭中含有大量鋅鹽,必須洗掉鋅鹽才可作為生物染色劑。

值得一提的是工業染料的名字與染色劑的名字有很大的差異,千萬不要混淆。

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