CATEGORIES

    GB/T 9758.5-1988
    Paints and varnishes--Determination of “soluble” metal content--Part 5:Determination of hexavalent chromium content of the pigment portion of the liquid paint or the paint in powder form--Diphenylcarbazide spectrophotometric method

    GB/T 9758.5-1988 "Paints and varnishes - Determination of 'soluble' metal content - Part 5: Determination of hexavalent chromium content in the pigment portion of liquid paints or in powder paints - Diphenylcarbazide spectrophotometric method" specifies a spectrophotometric method for determining the hexavalent chromium content in paints, applicable to the pigment portion of liquid paints or powder paints. Hexavalent chromium reacts with diphenylcarbazide to form a purplish-red complex, and its concentration is quantified by measuring absorbance with a spectrophotometer. The test requires instruments such as a spectrophotometer, cuvettes, an analytical balance, and volumetric flasks, providing an accurate method for controlling toxic hexavalent chromium in coatings.

    This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
    Status Active
    CCS G50 ICS 87.040
    Release Date 1988-09-05 00:00:00 Implementation Date 1989-04-01 00:00:00

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    Extended reading
    GB/T 9758.3-1988《Paints and varnishes--Determination of “soluble” metal content--Part 3:Determination of barium content--Flame atomic emission spectrometric method》

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    GB/T 9758.7-1988《Paints and varnishes--Determination of “soluble” metal content--Part 7:Determination of mercury content of the pigment portion of the paint and of the liquid portion of water-dilutable paints--Flameless atomic absorption spectrometric method》

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    GB/T 9760-1988《Paints and varnishes--Preparation of acid extracts from paints in liquid or powder form》

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    GB/T 9273-1988《Print-free test of film》

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    GB/T 9274-1988《Paints and varnishes--Determination of resistance to liquids》

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    GB/T 1672-1988《Liquid plasticizers--Determination of volume resisti-vity》

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    GB/T 5211.13-1986《Determination of acidity or alkalinity of theaqueous extract of pigments》

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    GB/T 6753.3-1986《Methods of test for package stability of paints》

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    GB/T 6753.6-1986《Large scale brushing test of coatings》

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