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碘量分析
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A polymeric membrane iodide sensitive electrode based on mer-cury-schiff base compound carrier has been prepared. The electrode is fairly selective for iodide over perchlorate, thiocyarate and salicylate. It gives linear response toward iodide over the concentration range 10-2-10-6mol/L and a response slope of 58.9mV/pI(at 20℃ ). The influence of lipophilic anionic and cationic sites on potentiometric response and selectivity has been studied. The electrode was applied successfully in the determination of iodine...

A polymeric membrane iodide sensitive electrode based on mer-cury-schiff base compound carrier has been prepared. The electrode is fairly selective for iodide over perchlorate, thiocyarate and salicylate. It gives linear response toward iodide over the concentration range 10-2-10-6mol/L and a response slope of 58.9mV/pI(at 20℃ ). The influence of lipophilic anionic and cationic sites on potentiometric response and selectivity has been studied. The electrode was applied successfully in the determination of iodine content in drugs . The results obtained were in fair agreement with the results given by precipitation method.

汞希夫碱化合物为载体的PVC膜电极表现出反Hofmeister行为,其选择序列为:Ⅰ~->NO_z~->ClO_4~->SCN~->Br~->NO_3~->Sal~->Cl~->SO_4~(2-)。电极在10~(-2)~10~(-6)mol/L的浓度范围内对Ⅰ~-具有线性响应,斜率为58.9mV/PI(20℃)。该电极响应性能不受测试底液中还原性稳定剂的影响。通过荷电离子掺入技术证实该电极系中性载体作用机制。电极应用于药物中含碘量的分析,取得满意结果。

In Gudao, Gudong and Shengtuo Oil Fields of Shengli ammonium thiocyanate can not be used nowadays as mud tracer for sealing core drilling owing to using it as injection water tracer, and neither iodides because of the existance of iodine in the reservoir strata, as showm in this paper. Four organic compounds are suggested for this Pinstead. The spectrophotometric determiations of these chemicals are Presented and their performance properties are evaluated: thermal stability; mutual influences of tracers and...

In Gudao, Gudong and Shengtuo Oil Fields of Shengli ammonium thiocyanate can not be used nowadays as mud tracer for sealing core drilling owing to using it as injection water tracer, and neither iodides because of the existance of iodine in the reservoir strata, as showm in this paper. Four organic compounds are suggested for this Pinstead. The spectrophotometric determiations of these chemicals are Presented and their performance properties are evaluated: thermal stability; mutual influences of tracers and mud upon each other; adsorptive and diffusivebehavior, and usages.

硫氰酸铵在许多油田已作为注水示踪剂注入油田,不能再用于密闭取心。碘化钾则由于地层含碘也不能使用。筛选出了可供大直径及密闭取心用的4种新示踪剂,其中SL-D2效果最好。本文报道了胜索坨油田油层含碘量分析结果,4种新示踪剂的检测方法及性能评价实验结果。

Acidity of the solution, carbon dioxide, air, microbes, illumination and personal and environmental factors all have a great influence upon the stability of sodium thio-sulfate standard solution, and thus cause errors in iodo-metric analyses concerned in the manufacture of nitrogenous fertilizers. By buffering the pH value of the solution, preventing carbon dioxide from penetrating into the solution, and strengthening the management of the analysts, sulfur separation from sodium thio-sulfate standard solution...

Acidity of the solution, carbon dioxide, air, microbes, illumination and personal and environmental factors all have a great influence upon the stability of sodium thio-sulfate standard solution, and thus cause errors in iodo-metric analyses concerned in the manufacture of nitrogenous fertilizers. By buffering the pH value of the solution, preventing carbon dioxide from penetrating into the solution, and strengthening the management of the analysts, sulfur separation from sodium thio-sulfate standard solution in production practice can be fundamentally solved, and the concentration of the solution can be kept stable.

 溶液的酸度、二氧化碳、空气、微生物、光照及人为和环境等因素对硫代硫酸钠标准溶液浓度的稳定性有很大的影响,继而造成氮肥生产中有关碘量分析法的误差,通过控制溶液的pH值,防止二氧化碳气体的渗入,加强对分析人员的管理,可从根本上解决生产实际中硫代硫酸钠标准溶液出现的析硫现象,保持其浓度的稳定性.

 
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