GB/T 20975.8-2020 标准详情

Textiles—Quantitative chemical analysis—Mixtures of polytetrafluoroethylene and certain other fibres

Methods for chemical analysis of tungsten - Part 24: Determination of phosphorus content - Molybdemum blue photometry

Surface chemical analysis—Secondary ion mass spectrometry—Linearity of intensity scale in single ion counting time-of-flight mass analysers

Methods for chemical analysis of gold—Part 12：Determination of silver, copper, iron, lead, bismuth, antimony, magnesium, nickel, manganese, palladium, chromium, platinum, rhodium, titanium, zinc, arsenic, tin, silicon, cobalt, calcium, potassium, lithium, sodium, tellurium, vanadium, zirconium, cadmium, molybdenum, rhenium, aluminum contents—Inductively coupled plasma atomic emission spectrometry

Methods for chemical analysis of antimony and antimony trioxide - Determination of sulfur content in antimony - Burning and sodium hydroxide titration method

Chemical analysis methods and determination of physical performance of alumina--Determination of sodium oxide content

Methods for chemical analysis of aluminium and aluminium alloys—Part 31：Determination of phosphorus content—Molybdenum blue spectrophotometry

Chemical analysis methods of magnesium and magnesium alloys - Part 8：Determination of rare earth content - Gravimetric method

Bismuth germanate (BGO) crystal—Chemical analysis of trace elements—Glow discharge mass spectrometry

Chemical analysis method of ion-adsorption rare earth ore—Determination of total rare earth contents—Inductively coupled plasma mass spectrometry

The methods for chemical analysis of nickel - Determination of iron content - Sulfosalicylic acid spectrophotometric method