The method is based on the catalyzing effect of manganeseon oxidation of arsenazoⅢby potassium periodate in HAc-NaAc medium and in the presence of Tween-80 as an en- hanced agent and 1,10-phenanthroline as an activator.

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It is a organic hexahydric weak acid. In different acidity, the dissociation degree and the color of reagent solvent were different also. Determined and draw the absorption curve of reagent in varies acidity, and figured out the dissociation constant by Perisic-Janjic method; the complex ratio of the reagent and bismuth was determinated by mole ratio method and continuous variation method; The apparent stability constant of the complex was calculated, the mechanism of dissociation and coordination were discussed.

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As for fine-grained Ta-Nb mineral, the flotation is generally adopted, and effective collectors is fatty acids, arsenic acids, phosphonic acids, hydroximic acids and cationics.

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Effect of several collectors on fersmite artificially synthesized under the condition of variable pH values and dosages were studied. The collecting characteristic of several representative collectors such as benzyl arsionic acid,α-styrolphhosphonic, diphosphonic acid, cyclic alkyl hydroximic acid and C(subscript 7-9) alkyl hydroximic acid was researched.

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Results showed that the new type rhodanine ramifications were good performance fluorescence reagents to determine the trace matter by fluorescence analysis.

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The sixth part: The spectrophotometric performance of the new type aresenoxylphenylazo rhodanine and carboxylphenylazo rhodanine ramifications was mainly studied.

第六部分：主要研究了幾種新型含胂酸基一级A片在线看无码免费、羧基若丹寧衍生物的分光光度性能啊啊啊轻点视频。

The fourth part: The influence of various active groups on the fluorescence performance of aresenoxylphenylazo rhodanine ramifications was studied systematically to seek the fluorescence reagents of good analysis performance.

第四部分：系統(tǒng)研究了各種活性基團對含胂酸基偶氮若丹寧衍生物熒光性能的影響，以尋求具有優(yōu)良分析性能的熒光試劑国产三级网片。

The influences of groups -CH〓 and -Cl on the fluorescence analysis performance of aresenoxylphenylazo rhodanine class were mainly studied.

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The fluorescence characteristic of aresenoxylphenylazo rhodanine and the influence of-F,-Cl,-NO〓 and -OCH〓 on the fluorescence analysis performance were studied.

首次研究了胂酸基偶氮若丹寧的熒光性質(zhì)japan无码，系統(tǒng)研究了-F人人操人人爱一区二区、-Cl、-NO〓啪啪啪小视频免费看、-OCH〓基團對其熒光分析性能的影響六九视频人屄。

Low valent selenium and telluronium compounds have high reducing selectivity to be used to form carbon-hydrogen bonds as special reducing reagents.

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