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本文介绍了将两性表面活性剂十二烷基二甲基胺基乙酸(DDMAA)应用于Fe-CAS体系。具有比阳离子表面活性剂空白值低、对比度大而比非离子表面活性剂灵敏度高优点。如在此体系中加入少量乙醇灵敏度又有很大提高。从而提高了测铁的选择性。
This article describes the application of the amphoteric surfactant dodecyldimethylammonioacetic acid (DDMAA) to the Fe-CAS system. Has a lower than the cationic surfactant blank value, high contrast and high sensitivity than non-ionic surfactants. Such as adding a small amount of ethanol in this system sensitivity has greatly improved. Thus increasing the iron determination of the selectivity.