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 fiberhttps://www.chinesestandard.net, 20.12.2020 - 13 sivua 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 10mm absorption cell 5mL of hydrofluoric 5mL of nitric absorption bottle absorption value acetone acid and 10mL Add 10mL Add 5mL ammonium fluoride Arsenic standard stock boric acid cadmium and arsenic cadmium Cd Chemical Reagent chromium standard solution cold atomic absorption Concentration of lead Continue stirring Cool to room determination of lead diphenylcarbazide solution dissolve glass fiber hexavalent chromium Cr6+ hexavalent chromium standard Hydrochloric acid hydrofluoric acid hydrogen peroxide inductively coupled plasma lead Pb mark line mercury Hg mercury meter mercury vapor micrograms µg milliliter milliliters mL mixed digestion solution mixed working curve nearest of 0.1mg nitric acid perchloric acid Pipette plastic bottle Potassium dichromate potassium permanganate solution PTFE beaker requirements of GB/T result retains three room temperature set volume Shake solution is 1.00mg/mL spectrophotometer standard curve standard stock solution stannous chloride solution test solution Transfer volume to 100mL wavelength