BS ISO 11535 pdf download

BS ISO 11535 pdf download Iron ores — Determination of various elements — Inductively coupled plasma atomic emission spectrometric method
The test portion is decomposed by fusion in a sodium carbonate/sodium tetraborate flux and the cooled meltis dissolved in hydrochloric acid.
The solution is diluted to volume and measured on an ICP spectrometer. Final results are read from acalibration graph prepared using standard solutions.
Reagents4
During the analysis, use only reagents of recognized analytical grade and only water that complies withgrade 2 of ISO 3696.
4.1lron oxide (Fe203), of minimum purity 99,99 %(mass fraction).
4.2Sodium carbonate(Na2CO3), anhydrous
To produce final impurity levels in a solution below the detection limits determined or suggested in theperformance test, a high-quality grade is required.
4.3Sodium tetraborate (Na2B407), anhydrous
The same purity criteria as for the sodium carbonate are required.
4.4Hydrochloric acid, ) 1,16 g/ml to 1,19 g/ml.
The same purity criteria as for the sodium carbonate are required
4.5Hydrochloric acid, 1,16 g/ml to 1,19 g/ml, diluted 1 + 1.
Add 500 ml of hydrochloric acid (4.4) to 500 ml of water and mix.
4.6Nitric acid.) 14 g/ml.
The same purity criteria as for the sodium carbonate are required
4.7Stock solutions.
4,7,1Phosphorus,1 000 ug/ml.
Dry approximately 10 g of potassium dihydrogen orthophosphate (KH2PO4) at 110 C until a constant mass isreached. and cool in a desiccator. Dissolve 4.393 6 g in about 200 ml of water in a 1 000 ml one-markvolumetric flask. When the dissolution is complete, dilute to volume with water and mix.
4.7.2Manganese,1 000 ug/ml.
Dissolve 1,000 0 g of high-purity manganese metal in 20 ml of hydrochloric acid (4.5) in a covered tall-formbeaker while heating. When dissolution is complete, cool, transfer to a 1 000 ml one-mark volumetric flaskdilute to volume with water and mix.
4.7.3Magnesium,1 000 ug/ml.
Dissolve 1,000 0 g of high-purity magnesium metal in 20 ml of hydrochloric acid (4.5) in a covered tall-formbeaker while heating. When dissolution is complete, cool, transfer to a 1 000 ml one-mark volumetric flaskdilute to volume with water and mix
4.7.4 Silicon, 1 000 µg/ml. Accurately weigh 2,1 39 3 g of pure silicon oxide (finely ground, previously heated at 1 000 °C for 45 min) into a platinum crucible (5.2). Mix with 5 g of sodium carbonate (4.2), and melt in a furnace at 1 000 °C for 1 5 min. Dissolve the melt in 1 00 ml of warm water and transfer to a 1 000 ml one-mark volumetric flask; increase the volume to approximately 500 ml with water, add 20 ml of hydrochloric acid (4.5), dilute to volume with water and mix. Store in a polyethylene flask.
4.7.5 Aluminium, 1 000 µg/ml. Dissolve 1 ,000 0 g of high-purity aluminium metal in 20 ml of hydrochloric acid (4.5) in a covered tall-form beaker. Add about 4 drops of nitric acid (4.6). When dissolution is complete, add about 20 ml of water and heat to liberate oxides of nitrogen. Cool and transfer to a 1 000 ml one-mark volumetric flask, dilute to volume with water and mix.