GB - Chinese national standards

Method for chemical analysis of rare earth ores - Part 2: Determination of scandium content

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Methods for analysis of noble metals in geochemical samples - Part 1General rules and regulations

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Methods for analysis of noble metals in geochemical samples - Part 2Determination of platinum and rhodium content-Preconcentration by thiourea-catalytic polarographic method

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Methods for analysis of noble metals in geochemical samples - Part 3: Determination of palladium content - Preconcentration by thiourea - graphite furnace atomic absorption spectrophotometric method

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Methods for analysis of noble metals in geochemical samples - Part 4: Determination of iridium content - Preconcentration by thiourea-catalytic spectrophotometric method

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Methods for analysis of noble metals in geochemical samples - Part 5: Determination of ruthenium and osmium content - Separationby distillation-catalytic spectrophotometric method

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Methods for analysis of noble metals in geochemical samples - Part 6: Determination of platinum, palladium and gold content - Preconcentration by fire assay - emission spectrometry

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Methods for analysis of noble metals in geochemical samples - Part 7: Determination of platinum group elements - By nickel sulfide fire assay-inductively coupled plasma mass spectrometry

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Foliar fertilizer with organic matter

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Foliar microelement fertilizer

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