BS ISO 7530-1:2015 pdf free

BS ISO 7530-1:2015 pdf free.Nickel alloys一Flame atomic absorption spectrometric analysis
Weigh 1 g±0,001 g of copper (Cu 299,9 %) and transfer it into a 400 ml beaker. Add 50 ml of nitric acid (4.2), cover with a watch glass, and allow to stand until the reaction ceases. Heat to complete dissolution,boil to remove nitrogen oxides, and evaporate just to dryness. Cool, add 25 ml of hydrochloric acid (4.3),
and evaporate just to dryness. Add again 25 ml of hydrochloric acid (4.3) and repeat the evaporation.Dissolve the salts in 50 ml of hydrochloric acid (4.4) and heat if necessary. Cool, transfer intoa 1 000 ml one-mark volumetric flask, dilute to the mark with water, and mix well.
Weigh 1 g±0,001 g of iron (Fe≥99,9 % ) and transfer it into a 400 ml beaker. Add 30 ml of hydrochloric acid (4.4) and cover with a watch glass. Heat to initiate the reaction and complete dissolution. Cool to about 50 °C, cautiously add 1 ml of hydrogen peroxide (4.7), and bring to the boil to oxidize the iron. Cool,transfer into a 1 000 ml one-mark volumetric flask, and add 35 ml of hydrochloric acid (4.3). Dilute to the mark with water and mix well.
Weigh 1 g±0,001 g of manganese (Mn≥99,9 %) and transfer it into a 400 ml beaker. Add 30 ml of hydrochloric acid (4.4) and 2 ml of nitric acid (4.1). Cover with a watch glass and heat to initiate the reaction and complete dissolution. Add 0,5 ml of hydrogen peroxide (4.7). Cool, transfer into a 1 000 ml one-mark volumetric flask, and add 50 ml of hydrochloric acid (4.3). Dilute to the mark with water and mix well.
a) The explosive nature of acetylene and regulations concerning its use.
b) The need to shield the eyes of the operator from ultraviolet radiation by means of tinted glass.
c) The need to keep the burner clear of deposits because a badly clogged burner can cause a flashback.
d) The need to ensure that the liquid trap is filled with water.
e) The need to spray distilled water between the test solutions, blank solution, and/or calibration solutions.
The atomic absorption spectrometer used shall be checked according to the instrument performance parameters given in Annex A.
The instrument shall be equipped with burners suitable for both an air/acetylene and a nitrous oxide/acetylene flame.
The instrument should be suitable for operating with single or multi-element element hollow cathode lamps powered at currents recommended by the manufacturer.BS ISO 7530-1 pdf free.