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 [Buy--download True-PDF in 3-second: https://play.google.com/books > Sign in > This BOOK > "3-dots" > Export > Save as "*.pdf"]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. |
Common terms and phrases
0.1mol/L sulfuric acid 0.2g of sample 100mL volumetric flask 5mL of hydrofluoric 5mL of nitric absorption bottle absorption value acetone acid and 10mL Add 40mL Add 5mL ammonium fluoride boric acid cadmium and arsenic cadmium Cd calculation result retains chromium standard solution Cold atomic absorption Conduct blank test content of hexavalent determination of lead diphenylcarbazide solution dissolve glass fiber grams g hexavalent chromium Cr6+ hexavalent chromium standard Hydrochloric acid hydrofluoric acid hydrogen peroxide ICP method inductively coupled plasma lead Pb mark line Mass fraction Mass of sample mercury Hg mercury meter mercury vapor milliliters mL mixed digestion solution nearest of 0.1mg nitric acid perchloric acid Pipette plastic bottle Potassium dichromate potassium permanganate solution PTFE beaker result retains three retains three significant room temperature set volume Shake solution is 1.00mg/mL spectrophotometer standard curve standard stock solution stannous chloride solution test solution three significant figures Transfer Volume of test volume to 100mL wavelength