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GB standards are the China national standards; Prefix code GB are Mandatory standards, GB/T are Recommended standards; All products or service must be compliance with GB standards; If you want to export products or services to huge Chinese market, need ensure they are meet the requirements of GB china national standards; We provide Chinese GB standards and English version GB standards Lookup, Translate, Download, Imported Commodity GB standards Testing and Compliance review services. |
| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 223.21-1994 |
Methods for chemical analysis of iron，steel and alloy--The 5-Cl-PADAB spectrophotometricmethod for the determination of cobalt content 钢铁及合金化学分析方法 5-Cl-PADAB分光光度法测定钴量 |
China National Standards mica |
 English PDF |
| GB/T 223.20-1994 |
Methods for chemical analysis of iron，steel and alloy--The fotentiometric titration method for the determination of cobalt content 钢铁及合金化学分析方法 电位滴定法测定钴量 |
China National Standards mica |
English PDF |
| GB/T 223.18-1994 |
Methods for chemical analysis of iron，steel and alloy--The sodium thiosulfate separation iodimetric method for the determination of copper content 钢铁及合金化学分析方法 硫代硫酸钠分离-碘量法测定铜量 |
China National Standards mica |
English PDF |
| GB/T 7533-1993 |
Determination for crystallizing point of organic chemical products for industrial use 有机化工产品结晶点的测定方法 |
China National Standards mica |
English PDF |
| GB/T 14839-1993 |
Technical symbols for geochemical exploration 地球化学勘查技术符号 |
China National Standards mica |
English PDF |
| GB/T 14827-1993 |
Organic chemical products forindustrial use--Test method for the determination of acidity and alkal-inity--Volumetric method 有机化工产品酸度、碱度的测定方法 容量法 |
China National Standards mica |
English PDF |
| GB/T 3284-1993 |
Analytical method of the chemical compositionin the quartz glass 石英玻璃化学成分分析方法 |
China National Standards mica |
English PDF |
| GB/T 14501.3-1993 |
Spectrochemical determination of tungsten，molybdenum，niobium，titanium and zirconium in uranium hexafluoride 六氟化铀中钨、钼、铌、钛、锆的测定 化学光谱法 |
China National Standards mica |
English PDF |
| GB/T 14501.1-1993 |
Spectrochemical determination of boron in uranium hexafluoride 六氟化铀中硼的测定 化学光谱法 |
China National Standards mica |
English PDF |
| GB/T 14496-1993 |
Terms of geochemical exploration 地球化学勘查术语 |
China National Standards mica |
English PDF |
| GB/T 14265-1993 |
General rule of chemical analysis for hydrogen，oxygen，nitrogen，carbon and sulfur in metal’s materials 金属材料中氢、氧、氮、碳和硫分析方法通则 |
China National Standards mica |
English PDF |
| GB 13733-1992 |
Air sampling rule of operation with exposure to toxic chemicals in the workplace 有毒作业场所空气采样规范 |
China National Standards mica |
English PDF |
| GB/T 13671-1992 |
Stainless steels--Method of electrochemical test for crevice corrosion 不锈钢缝隙腐蚀电化学试验方法 |
China National Standards mica |
English PDF |
| GB/T 13353-1992 |
Test method for resistance of adhesive bonds to chemical reagents--Metal to metal 胶粘剂耐化学试剂性能的测定方法 金属与金属 |
China National Standards mica |
English PDF |
| GB/T 223.16-1991 |
Methods for chemical analysis of iron，steel and alloy--The chromotropic acid photometric method for the determination of titanium content 钢铁及合金化学分析方法 变色酸光度法测定钛量 |
China National Standards mica |
English PDF |
| GB/T 223.12-1991 |
Methodsfor chemical analysis of iron，steel and alloy--The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content 钢铁及合金化学分析方法 碳酸钠分离-二苯碳酰二肼光度法测定铬量 |
China National Standards mica |
English PDF |
| GB/T 12938-1991 |
Determination of thiosulphate and other related residual chemicals in processed photographic materials--Iodine-amylose，methylene blue and silver sulphide densito-metric methods 已加工的摄影材料中硫代硫酸盐及其他相关化学残留物的测定方法 碘-直链淀粉法、亚甲蓝法和硫化银密度法 |
China National Standards mica |
English PDF |
| GB/T 4333.10-1990 |
Methods for chemical analysis of ferrosilicon--The infrared absorption method for the determination of carbon content 硅铁化学分析方法 红外线吸收法测定碳量 |
China National Standards mica |
English PDF |
| GB/T 12331-1990 |
Classified standard of operation with exposure to toxic chemicals in the workplace 有毒作业分级 |
China National Standards mica |
English PDF |
| GB/T 11914-1989 |
Water quality--Determination of thechemical oxyyen demand--Dichromate method 水质 化学需氧量的测定 重铬酸盐法 |
China National Standards mica |
English PDF |
| GB/T 11913-1989 |
Water quality--Determination of dissolved oxygen--Electrochemical probe method 水质 溶解氧的测定 电化学探头法 |
China National Standards mica |
English PDF |
| GB/T 223.66-1989 |
Methods for chemical analysis of iron，steel and alloy--The thiocyanate chlorpromazine hydrochloride--chloro form extraction photometric method for the determination of tungsten content 钢铁及合金化学分析方法 硫氰酸盐-盐酸氯丙嗪-三氯甲烷萃取光度法测定钨量 |
China National Standards mica |
English PDF |
| GB/T 223.46-1989 |
Methods for chemical analysis of iron，steel and alloy--The flame atomic absorption spectrometric method for the determination of magnesium content 钢铁及合金化学分析方法 火焰原子吸收光谱法测定镁量 |
China National Standards mica |
English PDF |
| GB/T 223.37-1989 |
Methods for chemical analysis of iron，steel and alloy--The indophenol blue photometric method for the determination of nitrogen content after distillation separation 钢铁及合金化学分析方法 蒸馏分离-靛酚蓝光度法测定氮量 |
China National Standards mica |
English PDF |
| GB/T 223.28-1989 |
Methods for chemical analysis of iron，steel and alloy--The α-benzoinoxime gravimetric method for the determination of molybdenum content 钢铁及合金化学分析方法 α-安息香肟重量法测定钼量 |
China National Standards mica |
English PDF |
| GB/T 223.19-1989 |
Methods for chemical analysis of iron，steel and alloy--The neocuproine-chloroform extraction photometric method for the determination of copper content 钢铁及合金化学分析方法 新亚铜灵-三氯甲烷萃取光度法测定铜量 |
China National Standards mica |
English PDF |
| GB/T 223.17-1989 |
Methods for chemical analysis of iron，steel and alloy--The diantipyryl methane photometric method for the determination of titanium content 钢铁及合金化学分析方法 二安替比林甲烷光度法测定钛量 |
China National Standards mica |
English PDF |
| GB/T 11222.1-1989 |
Radiochemical analysis of strontium-90 in ash of biological samples--Extraction chromatography by di-(2-ethylhexyl) phosphate 生物样品灰中锶-90的放射化学分析方法 二-(2-乙基己基)磷酸酯萃取色层法 |
China National Standards mica |
English PDF |
| GB/T 11221-1989 |
Radiochemical analysis of caesium-137 in ash of biological samples 生物样品灰中铯-137的放射化学分析方法 |
China National Standards mica |
English PDF |
| GB 10332-1989 |
Hygienic standard for mica dust in the air of workplace 车间空气中云母粉尘卫生标准 |
China National Standards mica |
English PDF |
| GB/T 3653.1-1988 |
Methods for chemical analysis of ferroboron--The alkalimetric method for the determination of boron content 硼铁化学分析方法 碱量滴定法测定硼量 |
China National Standards mica |
English PDF |
| GB/T 4333.8-1988 |
Methods for chemical analysisof ferrosilicon--The atomic absorption spectrometric method for the deter-mination of calcium content 硅铁化学分析方法 原子吸收光谱法测定钙量 |
China National Standards mica |
English PDF |
| GB/T 4333.6-1988 |
Methods for chemical analysis of ferrosilicon--The diphenylcarbazide photometric method for the determination of chromium content 硅铁化学分析方法 二苯基碳酰二肼光度法测定铬量 |
China National Standards mica |
English PDF |
| GB/T 4333.3-1988 |
Methods for chemical analysisof ferrosilicon--The potassium periodate photometric method for the determination of manganese content 硅铁化学分析方法 高碘酸钾光度法测定锰量 |
China National Standards mica |
English PDF |
| GB/T 4333.2-1988 |
Methods for chemical analysisof ferrosilicon--The reduced molybdobismuthylphosphoric acid photometric method for the determination of phosphorus content 硅铁化学分析方法 铋磷钼蓝光度法测定磷量 |
China National Standards mica |
English PDF |
| GB/T 3653.6-1988 |
Methods for chemical analysisof ferroboron--The reduced molybdoantimonylphosphoric acid photometric method for the determination of phosphorus content 硼铁化学分析方法 锑磷钼蓝光度法测定磷量 |
China National Standards mica |
English PDF |
| GB/T 3653.3-1988 |
Methods for chemical analysis of ferroboron--The perchloric acid dehydration-gravimetric method for the determination of silicon content 硼铁化学分析方法 高氯酸脱水重量法测定硅量 |
China National Standards mica |
English PDF |
| GB/T 8914-1988 |
Hygienic determination method of mercury in air of residential areas--Gold amalgamation-atomicabsorption spectrometric method 居住区大气中汞卫生标准检验方法 金汞齐富集-原子吸收法 |
China National Standards mica |
English PDF |
| GB/T 7731.10-1988 |
Methods for chemical analysis of ferrotungsten--The infrared absorption method for the determination of carbon content 钨铁化学分析方法 红外线吸收法测定碳量 |
China National Standards mica |
English PDF |
| GB/T 4702.14-1988 |
Methods for chemical analysisof chromium metal--The infrared absorption method for the determination of carbon content 金属铬化学分析方法 红外线吸收法测定碳量 |
China National Standards mica |
English PDF |
| GB/T 8654.6-1988 |
Methods for chemical analysis of manganese metal--The diamine hydrochloride-iodo-metric method for the determination of selenium content 金属锰化学分析方法 盐酸联氨-碘量法测定硒量 |
China National Standards mica |
English PDF |
| GB/T 223.3-1988 |
Methods forchemical analysis of iron，steel and alloy--The diantipyryl methane phosphomolybdate gravimetric method for the determination of phosphorus content 钢铁及合金化学分析方法 二安替比林甲烷磷钼酸重量法测定磷量 |
China National Standards mica |
English PDF |
| GB/T 8156.9-1987 |
Methods for chemical analysis of aluminium fluoride for industrial use--The molybdenum blue photometric method for the determination of phosphorus content 工业用氟化铝化学分析方法 钼蓝光度法测定磷量 |
China National Standards mica |
English PDF |
| GB/T 8156.8-1987 |
Methods for chemical analysis of aluminium fluoride for industrial use--The barium sulphate gravimetric method for the determination of sulphate content 工业用氟化铝化学分析方法 硫酸钡重量法测定硫酸根量 |
China National Standards mica |
English PDF |
| GB/T 8156.7-1987 |
Methods for chemical analysis of aluminium fluoride for industrial use--The 1，10-phenanthroline photometric method for the determination of iron content 工业用氟化铝化学分析方法 邻二氮杂菲光度法测定铁量 |
China National Standards mica |
English PDF |
| GB/T 8156.6-1987 |
Methods for chemical analysis of aluminium fluoride for industrial use--The molybdenum blue photometric method for the determination of silica content 工业用氟化铝化学分析方法 钼蓝光度法测定硅量 |
China National Standards mica |
English PDF |
| GB/T 8156.5-1987 |
Methods for chemical analysis of aluminium fluoride for industrial use--The flame emission photometric method for the determination of sodium content 工业用氟化铝化学分析方法 火焰发射光度法测定钠量 |
China National Standards mica |
English PDF |
| GB/T 8156.4-1987 |
Methods for chemical analysis of aluminium fluoride for industrial use--The EDTA volumetric method for the determination of aluminium content 工业用氟化铝化学分析方法 EDTA容量法测定铝量 |
China National Standards mica |
English PDF |
| GB/T 8156.3-1987 |
Methods for chemical analysis of aluminium fluoride for industrial use--The distillation-thoriumnitrate volumetric method for the determination of fluoride content 工业用氟化铝化学分析方法 蒸馏-硝酸钍容量法测定氟量 |
China National Standards mica |
English PDF |
| GB/T 8156.2-1987 |
Methods for chemical analysis of aluminium fluoride for industrial use--The electrometric method for the determination of water content 工业用氟化铝化学分析方法 电量法测定水分含量 |
China National Standards mica |
English PDF |
| GB/T 8156.1-1987 |
Methods for chemical analysis of aluminium fluoride for industrial use--The gravimetric method for the determination of moisture content 工业用氟化铝化学分析方法 重量法测定湿存水量 |
China National Standards mica |
English PDF |
| GB/T 8152.8-1987 |
Methods forchemical analysis of lead concentrates--The DTPM spectrophotometric method for the determination of bismuth content 铅精矿化学分析方法 二硫代二安替比林甲烷分光光度法测定铋量 |
China National Standards mica |
English PDF |
| GB/T 8152.6-1987 |
Methods for chemical analysis of lead concentrates--The polarographic method for the determination of bismuth content 铅精矿化学分析方法 极谱法测定铋量 |
China National Standards mica |
English PDF |
| GB/T 7731.5-1987 |
Methods for chemical analysis of ferrotungsten--The molybdenum blue photometric method for the determination of silicon content 钨铁化学分析方法 钼蓝光度法测定硅量 |
China National Standards mica |
English PDF |
| GB/T 7731.4-1987 |
Methods for chemical analysis of ferrotungsten--The molybdenum blue photometric method for the determination of phosphorus content 钨铁化学分析方法 钼蓝光度法测定磷量 |
China National Standards mica |
English PDF |
| GB/T 7731.1-1987 |
Methods for chemical analysis of ferrotungsten--The cinchonine gravimetric method for the determination of tungsten content 钨铁化学分析方法 辛可宁重量法测定钨量 |
China National Standards mica |
English PDF |
| GB/T 7729-1987 |
Chemical analysis of metallurgical products--General rule for spectrophotometric methods 冶金产品化学分析 分光光度法通则 |
China National Standards mica |
English PDF |
| GB/T 7728-1987 |
Chemical analysis of metallurgical products--General rule for flame atomic absorption spectrometric methods 冶金产品化学分析 火焰原子吸收光谱法通则 |
China National Standards mica |
English PDF |
| GB/T 223.58-1987 |
Methods for chemical analysis of iron，steel and alloy--The extraction-absorption catalytic polarographic method for the determination of manganese content 钢铁及合金化学分析方法 亚砷酸钠-亚硝酸钠滴定法测定锰量 |
China National Standards mica |
English PDF |
| GB/T 223.57-1987 |
Methods for chemical analysis of iron，steel and alloy--The extraction-absorption catalytic polarographic method for the determination of cadmium content 钢铁及合金化学分析方法 萃取分离-吸附催化极谱法测定镉量 |
China National Standards mica |
English PDF |
| GB/T 223.54-1987 |
Methods for chemical analysis of iron，steel and alloy--The flame atomic absorption spectrophotometric method for the determination of nickel content 钢铁及合金化学分析方法 火焰原子吸收分光光度法测定镍量 |
China National Standards mica |
English PDF |
| GB/T 223.53-1987 |
Methods for chemical analysis of iron，steel and alloy--The flame atomic absorption spectrophotometric method for the determination of copper content 钢铁及合金化学分析方法 火焰原子吸收分光光度法测定铜量 |
China National Standards mica |
English PDF |
| GB/T 223.52-1987 |
Methods for chemical analysis of iron，steel and alloy--The hydroxylamine hydrochloride-iodometric method for the determination of selenium content 钢铁及合金化学分析方法 盐酸羟胺-碘量法测定硒量 |
China National Standards mica |
English PDF |
| GB/T 223.51-1987 |
Methods for chemical analysis of iron，steel and alloy--The 2-(5-Bromo-2-pyridylazo)-5-diethylaminophenol photometric method for the determination of zinc content 钢铁及合金化学分析方法 5-Br-PADAP 光度法测定锌量 |
China National Standards mica |
English PDF |
| GB/T 7488-1987 |
Water quality--Determination of biochemical oxygen demand after 5 days(BOD5)--Dilution and seeding method 水质 五日生化需氧量(BOD5)的测定 稀释与接种法 |
China National Standards mica |
English PDF |
| GB/T 6767-1986 |
Radiochemical analysis of cesium-137 in water 水中铯-137放射化学分析方法 |
China National Standards mica |
English PDF |
| GB/T 6766-1986 |
Radiochemical analysis of strontium-90 in water--Extraction chromatography by di-(2-ethylhexyl) phosphori acid 水中锶-90 放射化学分析方法 二-(2-乙基己基) 磷酸萃取色层法 |
China National Standards mica |
English PDF |
| GB/T 6764-1986 |
Radiochemical analysis of strontium-90 in water--Precipitation by fuming nitric acid 水中锶-90放射化学分析方法 发烟硝酸沉淀法 |
China National Standards mica |
English PDF |
| GB/T 6730.8-1986 |
Methods for chemical analysis of iron ores--The potassium dichromate volumetric method for the determination of iron (Ⅱ)content 铁矿石化学分析方法 重铬酸钾容量法测定亚铁量 |
China National Standards mica |
English PDF |
| GB/T 6730.7-1986 |
Methods for chemical analysis of iron ores--The sulfosalicylic acid photometric method for the determination of metallic iron content 铁矿石化学分析方法 磺基水杨酸光度法测定金属铁量 |
China National Standards mica |
English PDF |
| GB/T 6730.6-1986 |
Methods for chemical analysis of iron ores--The ferric chloride-sodium acetate volumetric method for the determination of metallic iron content 铁矿石化学分析方法 三氯化铁-乙酸钠容量法测定金属铁量 |
China National Standards mica |
English PDF |
| GB/T 6730.51-1986 |
Methods for chemical analysis of iron ores--The caustic asbestos absorption gravimetric method for the determination of carbon content in carbonate 铁矿石化学分析方法 烧碱石棉吸收重量法测定碳酸盐中碳量 |
China National Standards mica |
English PDF |
| GB/T 6730.50-1986 |
Methods for chemical analysisof iron ores--The gas volumetric method for the determination of total carbon content 铁矿石化学分析方法 气体容量法测定总碳量 |
China National Standards mica |
English PDF |
| GB/T 6730.49-1986 |
Methods for chemical analysis of iron ores--The flame atomic absorption spectrophotometric method for the determination of sodium and potassium content 铁矿石化学分析方法 原子吸收分光光度法测定钠和钾量 |
China National Standards mica |
English PDF |
| GB/T 6730.48-1986 |
Methods for chemical analysis of iron ores--The dithio diantipyryl methane photometric method for the determination of bismuth content 铁矿石化学分析方法 二硫代二安替吡啉甲烷光度法测定铋量 |
China National Standards mica |
English PDF |
| GB/T 6730.36-1986 |
Methods for chemical analysis of iron ores--The flame atomic absorption spectrophotometric method for the determination of copper content 铁矿石化学分析方法 原子吸收分光光度法测定铜量 |
China National Standards mica |
English PDF |
| GB/T 6730.3-1986 |
Methods for chemical analysis of iron ores--The gravimetric method for the determination of hygroscopic moisture content in analytical samples 铁矿石化学分析方法 重量法测定分析试样中吸湿水量 |
China National Standards mica |
English PDF |
| GB/T 6730.14-1986 |
Methods for chemical analysis of iron ores--The flame atomic absorption spectrophotometric method for the determination of calcium and magnesium content 铁矿石化学分析方法 原子吸收分光光度法测定钙和镁量 |
China National Standards mica |
English PDF |
| GB/T 6730.1-1986 |
Methods for chemical analysis of iron ores--Preparation of predried test samples for chemical analysis 铁矿石化学分析方法 分析用预干燥试样的制备 |
China National Standards mica |
English PDF |
| GB/T 5889-1986 |
Method of quantitative analysis of ramie chemical components 苎麻化学成分定量分析方法 |
China National Standards mica |
English PDF |
| GB/T 5881-1986 |
Sampling method of physical and chemical properties of ramie fiber 苎麻理化性能试验取样方法 |
China National Standards mica |
English PDF |
| GB/T 5687.4-1985 |
Methods for chemical analysis of ferrochromium--The neutralization titration method for the determination of nitrogen content 铬铁化学分析方法 中和滴定法测定氮量 |
China National Standards mica |
English PDF |
| GB/T 223.48-1985 |
Methods for chemical analysis of iron，steel and alloy--The semixylenol orange photometric method for the determination of bismuth content 钢铁及合金化学分析方法 半二甲酚橙光度法测定铋量 |
China National Standards mica |
English PDF |
| GB/T 223.42-1985 |
Methods for chemical analysis of iron，steel and alloy--The anion-exchange separation-bromopyrogallol red photometric method for the determination of tantalumcontent 钢铁及合金化学分析方法 离子交换分离-溴邻苯三酚红光度法测定钽量 |
China National Standards mica |
English PDF |
| GB/T 223.41-1985 |
Methods for chemical analysis of iron，steel and alloy--The anion-exchange separation-pyrogallol photometric method for the determination of tantalum content 钢铁及合金化学分析方法 离子交换分离-连苯三酚光度法测定钽量 |
China National Standards mica |
English PDF |
| GB/T 223.38-1985 |
Methods for chemical analysis of iron，steel and alloy--The anion-exchange separation-gravimetric method for the determination of niobium content 钢铁及合金化学分析方法 离子交换分离-重量法测定铌量 |
China National Standards mica |
English PDF |
| GB/T 5124.4-1985 |
Methods for chemical analysis of hardmetals--The photometric peroxide method for the determination of titanium content 硬质合金化学分析方法 过氧化物光度法测定钛量 |
China National Standards mica |
English PDF |
| GB/T 5124.3-1985 |
Methods for chemical analysisof hardmetals--The potentiometric method for the determination of cobalt content 硬质合金化学分析方法 电位滴定法测定钴量 |
China National Standards mica |
English PDF |
| GB/T 4702.9-1985 |
Methods for chemical analysis of chromium metal--The crystal violet spectrophotometric method for the determination of antimony content 金属铬化学分析方法 结晶紫分光光度法测定锑量 |
China National Standards mica |
English PDF |
| GB/T 4702.8-1985 |
Methods for chemical analysis of chromium metal--The distillation-molybdenum blue spectrophotometricmethod for the determination of arsenic content 金属铬化学分析方法 蒸馏-钼蓝分光光度法测定砷量 |
China National Standards mica |
English PDF |
| GB/T 4702.11-1985 |
Methods for chemical analysis of chromium metal--The alizarin violet spectrophotometric method for the determination of tin content 金属铬化学分析方法 茜素紫分光光度法测定锡量 |
China National Standards mica |
English PDF |
| GB/T 4702.10-1985 |
Methods for chemical analysis of chromium metal--The cupral spectrophotometric method for the determination of copper content 金属铬化学分析方法 铜试剂分光光度法测定铜量 |
China National Standards mica |
English PDF |
| GB/T 4921-1985 |
Waste gasfrom manufacturing process--Determination of chemical oxygendemand and nitrogenoxide--Potassium dichromate oxidation and naphthylethylene diamine colorimetric method 工业废气 耗氧值和氧化氮的测定 重铬酸钾氧化、萘乙二胺比色法 |
China National Standards mica |
English PDF |
| GB/T 4702.3-1984 |
Methods for chemical analysis of chromium metal--The molybdenum blue photometric method for the determinationof phosphorus content 金属铬化学分析方法 钼蓝光度法测定磷量 |
China National Standards mica |
English PDF |
| GB/T 4333.7-1984 |
Methods for chemical analysis of ferrosilicon--The chromatographic separation-barium sulfate gravimetric method for the determination of sulfur content 硅铁化学分析方法 色层分离硫酸钡重量法测定硫量 |
China National Standards mica |
English PDF |
| GB/T 4333.1-1984 |
Methods for chemical analysis of ferrosilicon--The perchloric acid dehydration-gravimetric method for the determination of silicon content 硅铁化学分析方法 高氯酸脱水重量法测定硅量 |
China National Standards mica |
English PDF |
| GB/T 4146-1984 |
Textile terms and terminology (Parts of chemical fibers) 纺织名词术语 (化纤部分) |
China National Standards mica |
English PDF |
| GB/T 3654.9-1983 |
Methods for chemical analysisof ferroniobium--The thiocyanate photometric method for the determination of tungsten content 铌铁化学分析方法 硫氰酸盐光度法测定钨量 |
China National Standards mica |
English PDF |
| GB/T 3654.5-1983 |
Methods for chemical analysis of ferroniobium--The molybdenum blue photometric method for the determination of the phosphorus content 铌铁化学分析方法 钼蓝光度法测定磷量 |
China National Standards mica |
English PDF |
| GB/T 3654.4-1983 |
Methods for chemical analysis of ferroniobium--The combustion gravimetric method for the determination of carbon content 铌铁化学分析方法 燃烧重量法测定碳量 |
China National Standards mica |
English PDF |
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