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Method for measuring molybdate radical by using tetrasulfo nickel phthalocyanine-lead (II) optical probe

An optical probe, nickel phthalocyanine technology, which is applied in the field of molybdate determination with tetrasulfonickel phthalocyanine-lead optical probe, can solve the problems of insufficient stability and sensitivity, affecting the reliability of results and application, and achieves excellent sensitivity. , Easy and fast operation, simple effect of reagent composition

Pending Publication Date: 2022-06-24
XIAMEN UNIV
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Problems solved by technology

Thiocyanate spectrophotometry is a common method for the determination of molybdate, however, the stability and sensitivity of this method are still insufficient, which affects the reliability of the results and the application in practical work

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  • Method for measuring molybdate radical by using tetrasulfo nickel phthalocyanine-lead (II) optical probe
  • Method for measuring molybdate radical by using tetrasulfo nickel phthalocyanine-lead (II) optical probe
  • Method for measuring molybdate radical by using tetrasulfo nickel phthalocyanine-lead (II) optical probe

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[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more comprehensible, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] NiS 4 Pc can interact with common metal ions (Zn 2+ , Mn 2+ , Al 3+ , Ba 2+ , Cd 2+ , Pb 2+ , Ca 2+ , Cu 2+ , Ag + , Mg 2+ , Fe 3+ , Hg 2+ , Co 2+ , La 3+ , Ce 3+ ) react, resulting in precipitation. Among them, Pb 2+ to NiS 4 The precipitation effect of Pc is the best, and the NiS 4 Pc was completely precipitated. NiS 4 The Pc-Pb(II) precipitated complex can be dissolved by various anions. In the presence of low concentrations of benzenesulfonic acid, in addition to molybdate (M O O 4 2- ) can continue to dissolve the precipitate, and the above-mentioned dissolution effects of other anions are completely inhibited.

[0031] Based on the above, the present invent...

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Abstract

The invention relates to a method for determining molybdate radicals by using a tetrasulfo nickel phthalocyanine-lead (II) optical probe, which is characterized in that water-soluble tetrasulfo nickel phthalocyanine (NiS4Pc) and Pb < 2 + > ions can form an insoluble compound, and various acid radical ions can dissolve the compound; in the presence of low-concentration benzenesulfonic acid, the dissolving effect of most anions on precipitates is inhibited, only MOO4 < 2-> ions can still dissolve the NiS4Pc-Pb (II) precipitate compound to release NiS4Pc, and a solution phase shows the characteristic color and absorption of NiS4Pc, which indicates that the NiS4Pc-Pb (II) compound has high specific response performance to molybdate radicals. According to the invention, NiS4Pc-Pb (II) is taken as a specific recognition probe of MOO4 < 2->, a novel quantitative analysis method of MOO4 < 2-> is established, the specificity is strong, the stability is excellent, the operation is simple, convenient and rapid, the reaction system is characteristic blue, and the method is suitable for visual observation.

Description

technical field [0001] The invention relates to the technical field of photometric analysis, in particular to a method for measuring molybdate with a tetrasulfonickel phthalocyanine-lead (II) optical probe. Background technique [0002] Molybdate has stable properties and is a widely used catalyst with excellent performance. For example, iron molybdate and bismuth molybdate are commonly used catalysts for oxidation reactions. Water-soluble molybdates can be used as preservatives and fire retardants for metal materials. Molybdate replaced the more toxic chromate originally used in the industry in the 1980s and became the most commonly used corrosion inhibitor in circulating cooling systems. The ability of molybdate to protect metal materials is closely related to its content in solution. Therefore, in order to achieve good corrosion inhibition effect, monitoring the content of molybdate in circulating cooling water system has become an important practical work. Thiocyanic a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/01
CPCG01N21/31G01N21/01
Inventor 李东辉杨惠卿陈林黄萍邓雅斌
Owner XIAMEN UNIV
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