ISO 13547-1:2014 pdf free

ISO 13547-1:2014 pdf free.Copper, lead, zinc and nickel sulfide concentrates – Determination of arsenic
Quantitatively, transfer the precipitate into a 250 ml conical beaker with small amount of water. Add 15 ml of ammonium acetate solution (4.19) and place the conical beaker on the hotplate and heat until dissolution of the PbSO4.
Cool the solution to room temperature and filter through an insoluble filter paper (5.4), then wash the insoluble residue with dilute sulphuric acid (4.12). Reject the filtrate and washing solution. If acid insoluble material is present, then treat this residue as the procedure in 7.5, otherwise proceed to step 7.6.
Quantitatively, transfer the insoluble residue into a 200 ml polytetrafluoroethylene beaker (5.6) with a small quantity of deionised water. Add 5 ml of nitric acid (4.6)，2 ml of dilute sulphuric acid (4.11) and 3 ml to 5 ml of hydrofluoric acid (4.8). Heat the solution until the evolution of white sulphuric acid fumes to remove silicon dioxide then allow to cool. Dissolve the soluble salts with 10 ml of deionised water and 10 ml of nitric acid (4.6). Proceed to step 7.6.
Quantitatively, transfer the solution from step Z.5 and the filtrate from step 7.3 into a 300 ml conical beaker and dilute to approximately 150 ml with water. Add 5 g of ammonium chloride (4.4) to the solution and agitate to dissolve. Add sufficient iron chloride solution (4.16) to give a total mass of 150 mg of iron in the filtrate.
If the mass of iron from the test portion is above 150 mg, then do not add any iron chloride solution (4.16). Add sufficient aqueous ammonia (4.14) to effect complete precipitation then add an extra 10 ml of aqueous ammonia. Bring it to boil and leave boiling for 1 min.
Immediately, filter through the coprecipitation filter paper (5.5) and wash several times with warm ammonia solution (4.15). Store the coprecipitation filter paper in the original conical beaker.
Repeat the separation on the filtrate by evaporating the filtrate down to approximately 150 ml. Add 15 ml of dilute sulfuric acid (4.12) and mix, then add 5 g of ammonium chloride (4.4) to the solution and agitate to dissolve. Add sufficient iron chloride solution (4.16) to give a total mass of 150 mg iron in the filtrate. Add sufficient aqueous ammonia (4.14) to effect complete precipitation then add an extra 10 ml of aqueous ammonia. Bring to boil and leave boiling for 1 min.
Immediately, filter through the co-precipitation filter paper (5.5) and wash several times with warm ammonia solution (4.15). Reject the filtrate and washing solution.ISO 13547-1 pdf download.