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Natural gas. Determination of composition with defined uncertainty by gas chromatography method. Part 5. Determination of nitrogen, carbon dioxide and C1 to C5 and C6+ hydrocarbons for a laboratory and for a laboratory and on-line process application using three columns

Document status: Replaced by GOST 31371.5-2022

Technical liquid ammonia. Determination of ferrum mass concentration by method of photocalorimetry

Document status: Active

Metal frame yield supports. Trapezoid supports. General specifications

Document status: Active

Gas-consuming thermal units. Industrial gas-burners. Limiting concentration rates of NOx of combustion products

Document status: Replaced by GOST R 50591-2013

Carbonaceous materials for use in the production of aluminium. Green and calcined coke. Determination of trace elements by flame atomic absorption spectroscopy

Document status: Active

Amperometric analyzers for dissolved oxygen SSI. General technical requirements

Document status: Active