Test kit for measuring the level of carboxylate anion in engine coolant
    2.
    发明申请
    Test kit for measuring the level of carboxylate anion in engine coolant 失效
    用于测量发动机冷却液中羧酸根阴离子含量的试剂盒

    公开(公告)号:US20070138434A1

    公开(公告)日:2007-06-21

    申请号:US11303759

    申请日:2005-12-15

    IPC分类号: C09K5/00

    摘要: The invention includes, in one embodiment, a method for determining the presence or absence of a corrosion-inhibitory level of carboxylate anion in used engine coolant which includes: obtaining a known quantity of the engine coolant as a representative sample thereof, the sample containing a level of carboxylate anion to be determined; adding a fixed quantity of an aluminum containing color indicator to the sample, where the color of the aluminum color indicator is different from the original color of the sample, thereby changing the color of the sample to substantially the color of the aluminum color indicator, where at least a portion of the aluminum color indicator complexes with at least a portion of the carboxylate anion to form a colored insoluble aluminum-carboxylate complex, where the colored insoluble aluminum-carboxylate complex precipitates, and where the color of the sample remains substantially the color of the aluminum color indicator when the level of carboxylate anion therein is below an effective corrosion-inhibitory amount and where the color of the sample returns substantially to the original color of the sample when the level of carboxylate anion is at an effective corrosion-inhibitory amount; and observing the color of the sample.

    摘要翻译: 在一个实施方案中,本发明包括用于确定在使用的发动机冷却剂中是否存在羧酸根阴离子的腐蚀抑制水平的方法,其包括:获得已知量的发动机冷却剂作为其代表性样品,所述样品含有 要确定的羧酸根阴离子水平; 向样品中添加固定量的含铝颜色指示剂,其中铝颜色指示器的颜色与样品的原始颜色不同,从而将样品的颜色改变为基本上铝颜色指示器的颜色,其中 铝颜色指示剂的至少一部分与羧酸根阴离子的至少一部分复合以形成着色的不溶性铝 - 羧酸盐配合物,其中着色的不溶性铝 - 羧酸盐络合物沉淀,并且其中样品的颜色基本保持为颜色 的铝颜色指示剂,当其中羧酸根阴离子的含量低于有效的腐蚀抑制量时,当羧酸根阴离子的含量处于有效的抑制抑制量时,样品的颜色基本上恢复到样品的原始颜色 ; 并观察样品的颜色。