GB/T 33999-2017: Translated English of Chinese Standard. (GBT 33999-2017, GB/T33999-2017, GBT33999-2017): Limits and determination of lead, cadmium, mercury, arsenic and hexavalent chromium in glass fiber
https://www.chinesestandard.net, 20 dic 2020 - 13 pagine
This Standard specifies limits and determination of lead (Pb), mercury (Hg), cadmium (Cd), arsenic (As) and hexavalent chromium (Cr6+) in glass fiber. This Standard is applicable to glass fiber as well as its products. For coated glass fiber products, glass fiber in glass fiber reinforced plastics, after removing the coated or attached components, this Standard also applies.
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0.1mol/L sulfuric acid 0.2g of sample 100mL volumetric flask 5mL of hydrofluoric 5mL of nitric absorbance absorption bottle absorption value according acetone Add 5mL analytical arsenic arsenic mixed boric acid cadmium and arsenic cadmium Cd calculation Chemical Reagent chromium standard solution clean concentration container Cool determination of lead digestion tank Dilute dissolve document Draw Element filter GB/T glass fiber Heat hexavalent chromium Cr6+ hexavalent chromium standard hydrofluoric acid inductively coupled plasma lead Pb less mark line Mass mercury Hg mercury meter mercury vapor mixed digestion solution nearest of 0.1mg nitric acid perchloric acid Perform Pipette plastic bottle potassium permanganate solution preparation Principle pure Reagents references Remove respectively add result rinse room temperature set volume Shake solution is 1.00mg/mL spectrophotometer standard curve standard solution standard stock solution stannous chloride solution Store Table Take test solution Transfer valve volume to 100mL Wang wavelength Weigh