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氯烃基二甲基代苯甲胺（ｂｅｎｚａｌｋｏｎｉｕｍｃｈｌｏｒｉｄｅ，ＢＡＣ）季胺化合物能与蛋白质反应形成浊度［１］，据此，用于脑脊液蛋白质含量的测定。１ 材料与方法１．１ 试剂１．１．１ ＢＡＣ贮存液 于９０ｍｌ蒸馏水中溶解ＢＡＣ（Ｓｉｇｍａ，Ｂ－６２９５）
The quaternary ammonium chloride compound of benzalkonium chloride (BAC) reacts with protein to form turbidity [1], and is used for the determination of cerebrospinal fluid protein content. 1 Materials and Methods 1.1 Reagents 1.1.1 BAC stock solutions BAC (Sigma, B-6295) was dissolved in 90 ml of distilled water