摘要
本文用乳光法测定了不同 PH 条件下。Th(NO_3)_4和 La(NO_3)_3对新生态的负电性 AgBr 溶胶的聚沉和稳定作用情形.结果表明:PH 较低时,钍以 Th^(4+)(水含)存在;PH 较高时 ,钍以 Th(OH)^(3+)存在.Th^(4+)和 Th(OH)^(3+)两种离子都能 AgBr 溶胶再带电而稳定和.但 La^(3+)没有这种带电的能力.本文用新的带电观点较为满意地解释了上述现象.
Coagulation and Stabilization of thorium nitrate and Lanthanum nitrate for negatively charged silver bromide sols in statu nascendi are determined at various PH by light-scat- tering intensity.The results show that thorium exist with Tn^(4+)(lagueous) at lower PH and with Tn(OH)^(3+)at higher PH.Both Tn^(4+)and Tn(OH)^(3+)can reverse the charge of the originally negative AgBr sols,but La^(3+)can not.This paper explains satisfactorily the phenomena by a new point of view.
出处
《云南师范大学学报（自然科学版）》
1991年第1期71-75,共5页
Journal of Yunnan Normal University:Natural Sciences Edition
关键词
溴化银
再带电
硝酸钍
溶胶
Thorium nitrate
Silver bromide sols
Reversal of charge
