The gravimetric method for determinating organic phosphonic acid HPBA with quinoline phosphomolybdate is studied.

用喹啉磷钼酸盐重量法对有机膦酸HPBA主含量的测定进行了分析。

There is little study on the selection of liquid of pre - filming after the acid wash by hydroxy ethidine phosphonic acid (HEDP).

膦酸酸洗后预膜液的选择较少有人,而适当的预膜钝化是防止酸洗后金属表面返锈的必要措施。