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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 7604-1987 Determination of the aromatic hydrocarbon content in mineral insulating oils - 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 7492-1987 Water quality--Determination ofBHC and DDT--Gas chromatography - 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 7487-1987 Water quality--Determinationof cyanide--Part 2:Determination of cyanide - 英文版 |
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GB/T 7486-1987 Water quality--Determination of cyanide--Part 1:Determination of total cyanide - 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 7483-1987 Water quality--Determination of fluoride--Fluor reagent spectrophotometric - 英文版 |
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GB/T 7482-1987 Water quality--Determination of fluoride--Visual colorimetry with zirconium alizarinsulfonate - 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 7475-1987 Water quality--Determination of copper， zinc， lead and cadmium--Atomic absorption spectrometry - 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 7468-1987 Water quality--Determination oftotal mercury--Cold atomic absorption spectrophometry - 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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