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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 - 英文版 |
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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 - 英文版 |
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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 - 英文版 |
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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 - 英文版 |
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GB/T 7494-1987 Water quality--Determination of anionic surfactants--Methylene blue spectrophotometric method - 英文版 |
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GB/T 7493-1987 Water quality--Determination of nitrogen(nitrite)--Spectrophotometric method - 英文版 |
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GB/T 7491-1987 Water quality--Determination of volatile phenolic compounds--After distillation with bromine method - 英文版 |
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GB/T 7490-1987 Water quality--Determination of volatile phenolic compounds--After distillation by means of 4-AAP spectrophotometric method - 英文版 |
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GB/T 7489-1987 Water quality--Determination of dissolved oxygen--Iodometric method - 英文版 |
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GB/T 7488-1987 Water quality--Determination of biochemical oxygen demand after 5 days(BOD5)--Dilution and seeding method - 英文版 |
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GB/T 7485-1987 Water quality--Determination of total arsenic--Silver diethyldithiocarbamate spectrophotometricmethod - 英文版 |
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GB/T 7484-1987 Water quality--Determination of fluoride--Ion selective electrode method - 英文版 |
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GB/T 7481-1987 Water quality--Determination of ammonium--Spectrophotometric method with salicylic acid - 英文版 |
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GB/T 7480-1987 Water quality--Determination of nitrate--Spectrophotometric method with phenol disulfonic acid - 英文版 |
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GB/T 7479-1987 Water quality--Determination of ammonium--Nessler’s reagent colorimetric method - 英文版 |
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GB/T 7478-1987 Water quality--Determination of ammonium--Distillation and titration method - 英文版 |
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GB/T 7477-1987 Water quality--Determination of thesum of calcium and magnesium--EDTA titrimetric method - 英文版 |
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GB/T 7476-1987 Water quality--Determination of calcium--EDTA titrimetric method - 英文版 |
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GB/T 7474-1987 Water quality--Determination of copper--Sodium diethyldithiocabamate spectrophotometric method - 英文版 |
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GB/T 7473-1987 Water quality--Determination of copper--2，9-dimethy-1，10-phenanthroline spectrophotometric method - 英文版 |
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GB/T 7472-1987 Water quality--Determination of zinc--Spectrophotometric method with dithizone - 英文版 |
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GB/T 7471-1987 Water quality--Determination of cadmium--Spectrophotometric method with dithizone - 英文版 |
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GB/T 7470-1987 Water quality--Determination of lead--Spectrophotometric method with dithizone - 英文版 |
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GB/T 7469-1987 Water quality--Determination of the total mercury--Potassium permanganate-pootassium peralfate descomposed method--Dithizone spectrophotometric method - 英文版 |
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GB/T 7467-1987 Water quality--Determination of chromium(Ⅵ)--1，5 Diphenylcarbohydrazide spectrophotometric method - 英文版 |
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GB/T 7130-1986 Determination of free phenols in phenol-formaldehyde mouldings--Iodometric method - 英文版 |
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GB/T 6920-1986 Water quality--Determination of pH value--Glass electrode method - 英文版 |
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GB/T 6730.8-1986 Methods for chemical analysis of iron ores--The potassium dichromate volumetric method for the determination of iron (Ⅱ)content - 英文版 |
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GB/T 6730.7-1986 Methods for chemical analysis of iron ores--The sulfosalicylic acid photometric method for the determination of metallic iron content - 英文版 |
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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 - 英文版 |
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