Leather -- Determination of total silicon content -- Reduced molybdosilicate spectrometric method
适用范围：Principle: oxydation of a test portion in a Parr bomb under alkaline conditions to destroy organic matter and to solubilize the mineral matter. Formation of molybdosilicate complex and spectrometric me...
发布日期：1984-02-01 实施日期：1984-02-01
Chemical analysis of zinc alloys. Spectrophotometric determination of iron.
实施日期：1967-10-01
Liquefied anhydrous ammonia for industrial use -- Determination of oil content -- Gravimetric and infra-red spectrometric methods
适用范围：A test portion is evaporated at ambient temperature and the oil contained in the residue is extracted with carbon tetrachloride. The oil contained in the residue is determined either gravimetrically by...
发布日期：1985-06-01 实施日期：1985-06-01
Fruits, vegetables and derived products -- Determination of iron content -- 1,10- Phenanthroline photometric method
适用范围：The method consists in decomposing the organic matter, followed by reduction of trivalent iron by hydroxyammonium chloride, forming, in a buffered medium, of the stable iron(II)/1,10 phenanthroline com...
发布日期：1978-05-01 实施日期：1978-05-01
Aluminium oxide primarily used for the production of aluminium -- Determination of titanium content -- Diantipyrylmethane photometric method
适用范围：Applicable to all products having a titanium dioxide content of equal to or more than 0.001 % (m/m). Describes the preparation of the diantipyrylmethane solution and the preparation of the titanum stan...
发布日期：1977-10-01 实施日期：1977-10-01
Chemical analysis of hydrochloric, nitric and sulphuric acids. Spectrophotometric determination of iron.
Fruits juice and vegetables juice. Determination of the lead content. Flameless atomic absorption photometry.
实施日期：1982-06-01
Manganese ores and concentrates -- Determination of nickel content -- Dimethylglyoxime spectrometric method and flame atomic absorption spectrometric method
适用范围：Two methods are specified. Method A is applicable to products having a nickel content of 0.01 to 1.0 % (m/m), method B is applicable to products having a nickel content of 0.005 to 1.0 % (m/m). Both me...
发布日期：1984-05-01 实施日期：1984-05-01
Chemical analysis of zinc. Spectrophotometric determination of indium.
实施日期：1968-07-01
Aluminium and aluminium alloys -- Determination of titanium -- Spectrophotometric chromotropic acid method
适用范围：The method is applicable to products having titanium contents between 0,005 and 0,3 % (m/m). However, the method is not applicable completely to alloys having silicon contents higher than 1 % (m/m) (se...
发布日期：1978-12-01 实施日期：1978-12-01
Steel and iron -- Determination of vanadium content -- N-BPHA spectrophotometric method
适用范围：The method is applicable to vanadium contents between 0.005 % (m/m) and 0.50 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report. Annex A gives...
发布日期：1988-12-01 实施日期：1988-12-01
Steel -- Determination of niobium content -- PAR spectrophotometric method
适用范围：The method is applicable to types of steel with niobium contents between 0,005 % (m/m) and 1,3 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test rep...
发布日期：1988-12-01 实施日期：1988-12-01
Chemical analysis of lead and lead oxides. Turbidimetric determination of tin.
实施日期：1957-04-01
Manganese ores and concentrates -- Determination of arsenic content -- Spectrometric method
适用范围：The method is applicable to products having an arsenic content of 0,001 to 0.2 % (m/m). Should be read in conjunction with ISO 4297. Specifies principle, reactions, reagents, apparatus, sample, procedu...
发布日期：1984-03-01 实施日期：1984-03-01
Chemical analysis of ferro-tungsten. Spectrophotometric determination of tin.
Manganese ores and concentrates -- Determination of total iron content -- Titrimetric method after reduction and sulfosalicylic acid spectrophotometric method
适用范围：Method A is applicable to products having a total iron content from 1 to 25 % (m/m), and method B is applicable to products having a total iron content from 0.2 to 2 % (m/m). ISO 7990 should be read in...
发布日期：1985-12-01 实施日期：1985-12-01
Sodium hydroxide for industrial use -- Determination of mercury content -- Flameless atomic absorption spectrometric method
适用范围：Covers a method applicable to liquid or solid products having mercury contents greater than 0,02 mg/kg. The principle of determination is based on oxidation of the mercury contained in a test portion t...
发布日期：1979-09-01 实施日期：1979-09-01
Products derived from fruits and vegetables. Determination of benzoic acid content.
实施日期：1972-07-01
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