【摘要】 本文研究了水中低浓度银离子的离子浮选条件。Ag~+与邻菲罗啉(O—phen)形成络阴离子后,阴离子表面活性剂DBS将它浓缩于泡沫中。消耗液经蒸发,点涂于滤纸上进行X—线荧光光度测定。试样溶液用量为500ml时,可测定最低浓度为10ppb。更多还原

【Abstract】 Silver ion in the sample of 500ml was reacted with o-phenanthroline to give chelate ion at pH 4.2. The chelate was then floated using sodium dodecylbenzene sulfonate as a counter ionic surfactant. Nitrogen bubbling gas flow rate was 135wlmin-1,and separation took 2 min. The foam collected was defoamed with 1-propanol and evaporated to about 1 ml. The residual solution was dropped to a piece of filter paper and determined by X-ray fluorescence spectrometry. The determinable concentration range was 10-150 ppb.更多还原