期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
极谱仪-阳极溶出伏安法测定大米中镉的方法研究 被引量:1
1
作者 张雷 《农业与技术》 2020年第24期74-76,共3页
本文采用极谱仪-阳极溶出伏安法测定大米中的镉,通过实验确定样品的前处理条件为:灰化温度600℃,灰化时间6h,灰化后样品采用1%硝酸溶液定容,选用乙酸-氨水作为缓冲溶液;仪器工作条件确定为:扫描电位范围-0.75~0.00V,预富集电位-0.75V,... 本文采用极谱仪-阳极溶出伏安法测定大米中的镉,通过实验确定样品的前处理条件为:灰化温度600℃,灰化时间6h,灰化后样品采用1%硝酸溶液定容,选用乙酸-氨水作为缓冲溶液;仪器工作条件确定为:扫描电位范围-0.75~0.00V,预富集电位-0.75V,预富集时间120s,搅拌速度2000rpm。 展开更多
关键词 -溶出伏安 大米中镉 前处理条件优化 仪器工作条件优化
在线阅读 下载PDF
DF-1型电化学分析仪
2
作者 王庆璋 王维新 《山东海洋学院学报》 1985年第1期107-112,共6页
Model DF-1 electrochemical analyzer is a many-purpose electrochemical instrumentation with following five functional select switches for operating conditions: cathodic /anodie polarization; single/cycle sean;two/thre... Model DF-1 electrochemical analyzer is a many-purpose electrochemical instrumentation with following five functional select switches for operating conditions: cathodic /anodie polarization; single/cycle sean;two/three electrodes system;direct/derivative output;normal/differential mode. Consequently they can be combined into several working manners, result in different experimental methods as consistent with desire. This instrument has manifold compensator and adjuster with a wide-range, so that the sensitivity and the signal graph have been able to improve. In addition, the instrument incorporates a strip-chart recorder and an exact timer. It is also equipped with electrochemical bench and a set of electrodes including the rotating glassy carbon electrode, gold plate electrode, silver plate electrode, mercury coated silver base electrode, hanging mercury electrode etc. In order to broaden the field of its application, all units of the instrument can be unitized, but each and every can be also used independently. The instrument is applicable to polarography, voltammetry, potentiometric stripping, potentiostatic electrolysis,differential technique, coulometry, linear polarization method, cycle voltammetry, passivation curve, and some other electrochemical technique, which have need for electrochemical cell with two, three,or four electrodes. This paper describes the design fundament, feature and specification of the electrochemical analyzer, and finally gives laboratory application some experimental examples. 展开更多
关键词 DF—1 电化学分析仪 极谱-伏安法 参数调节 工作状态
在线阅读 下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部