Conceal disturbing elements like iron,copper,lead with hydrogen fluoride amine-EDTA,add the potassium iodide to separate iodine, and take starch as indicator,titrate with sodium hyposulfite.

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The major methods involved in this paper are cyanidation,thiocarbamide process,thiocyanate process,thiosulfate process, multi-sulfide process,haloid process,and other reagents procss;the advantages and disadvantages of the methods as well as the suitability of these methods for treating various silver bearing ores are generally analyzed.

綜述了國內(nèi)外關于銀浸出技術的各種方法，主要內(nèi)容包括氰化法操到喷水视频、硫脲法国产一级精品毛片性色AV大片、硫氰酸鹽法、硫代硫酸鹽法一级二级片、多硫化物法成年网站免费进入污、鹵化物法和其他試劑法等，簡要分析了各種方法適用的含銀礦石及其利弊人人干人操。

If the specific surface area (0.3391 m2/g) of non-modified tea extracted residual was set as 1, the specific surface area of 9 adsorbents, modified with optimized condition, will be 24.7 thiocarbamide plus phosphorylation (1, 12.2 phosphorylation (1, 6.7, 6.5 phosphorylation (2, 6.1 (sodium thiosulfate modification), 5.9 formaldehyde (1, 5.8 formaldehyde (2, 5.4, and 4.9.

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Quick vulcanization adjuvant, and said adjuvant includes dithioalchol benzothiazole, dibenzothiazole disulfide, tetra methylthiuram disulfide, zinc methyl phenyl dithio carbamate and ethyleen thiourea.

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Bunte salt was first prepared by α-furfuryl chloride and sodium thiosulfate. Then under the reaction of Bunte salt with 2-methyl-3-furanthiol in the presence of sodium hydroxide, furfuryl 2-methyl-3-furyl disulfide was prepared.

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Theoretical studies on various geometrical structures of Hypophosphorous acid were carried out using DFT theoretical methods,at the B3LYP/6—311++G** level.Intramolecular proton transfer isomerization has also been studied using the intrinsic reaction coordinate.

采用量子化學密度泛函B3LYP方法，在6—311++G**基組水平上全優(yōu)化得到了硫代次磷酸的硫酮式和硫醇式兩種構型異構體以及相應的對映異構體作爱综合，同時對分子內(nèi)質(zhì)子轉(zhuǎn)移異構化反應微觀機理進行了理論分析亚洲色图在线综合。

Theoretical studies on various geometrical structures of Hypophosphorous acid were carried out using DFT theoretical methods, at the B3LYP/6-311 ++ G(superscript **) level. Intramolecular proton transfer isomerization has also been studied using the intrinsic reaction coordinate.

采用量子化學密度泛函B3LYP方法，在6-311++G基組水平上全優(yōu)化得到了硫代次磷酸的硫酮式和硫醇式兩種構型異構體以及相應的對映異構體99这里只有精品首页，同時對分子內(nèi)質(zhì)子轉(zhuǎn)移異構化反應微觀機理進行了理論分析。

Keywords hypophosphorous acid;thiol isomer thione isomers;enantiomer;proton transfer;isomerization reaction

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On the condition of the existence of the buffer solution of ammonium acetate (PH5-6) and ammonium thiocyanate, quantitatively reduce Cu2+ into Cu+ by using sodium thiosulphate .

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The chemical deposition method was applied to prepare bismuth sulfide through reaction of bismuth salt complexed by triethanolamine or EDTA with an aqueous solution containing a sulfur sourse such as thioacetamide, thiourea, sodium thiosulphate, geseous H2S.

化學淀積方法被提出申請準備硫化鉍經(jīng)過被和一個水溶液的三乙醇胺或乙二胺四醋酸合成物的鉍鹽反作用含有硫 sourse国产一级黄片欧美一级，像是硫代乙醯胺人人人插人人干，硫，鈉 thiosulphate 久久99精品视频A片， geseous H2S 亚欧无码黄色视频。