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Analytical procedure of ore element analyzer

Writer:公司Source:公司 Number of visits: Date:2016-6-29
1, the decomposition of the sample
1) acid decomposition [vanadium content is less than 0.05% (m/m), molybdenum and copper content is less than 0.1% (m/m) of the sample]
"Take 0.2000g specimen is placed in 300ml beaker, add 30ml hydrochloric acid, surface of the upper cover plate, slow heating decomposition of sample, not boiling, so as to avoid the volatilization of ferric chloride. Flush with the surface plate and the beaker wall by water jetting, until the volume is about 50mL. With Filterpaper filter not soluble residue, residue washed with hot hydrochloric acid (1+50), until see the Yellow ferric chloride now and then hot water wash 6 ~ 8 times. The filtrate and washings were collected at 600 mL beaker, this is the main liquid.
The filter paper and the residue into a platinum crucible, ashing, at 800 DEG 20min burning, cooling. With sulfuric acid (1 + 1) wetting residue, add 5 ml of hydrofluoric acid, low temperature heating to sulfur trioxide white smoke take, to remove the silicon dioxide and sulfuric acid. Take down, plus 2G potassium sulfate in the crucible after cooling, the slow heating up to 650 degrees Celsius melting about 5min, cooling. The crucible is put in the original beaker, add 25mL water and 5mL of hydrochloric acid, dissolved hot melt. Wash the crucible, the solution into the main fluid. Evaporation under non boiling condition to about 100mL.
Note: after the decomposition of hydrochloric acid samples, such as a small amount of white slag, you can not slag, no significant impact on the results.
(2) melt acidification [vanadium content of less than 0.05% (m/m), molybdenum and copper content of less than 0.1% (m/m) of the sample]
"Take 0.2000g specimen is placed in a corundum crucible, 3 G and mixed flux (Na2O2 + sodium carbonate = 2 + 1), full mixing, cover 1 g mixed flux, in 800 DEG C melting of about 15 minutes.
Cooling the melt, the crucible into a 600mL beaker, add 100mL water, boil a few minutes, the leaching of molten material. Add 20mL of hydrochloric acid, sodium carbonate and sodium hydroxide heated to decomposition so far no longer blistering. Wash the crucible, and the washing liquid is added to the solution. Evaporation under non boiling condition to about 100mL.
(3) melt filtration [vanadium content is greater than 0.05% (m/m), molybdenum content is greater than 0.1% (m/m), copper content is less than 0.1% (m/m) of the sample]
Said take 0.2000g specimen is placed in a corundum crucible, 3 G and mixed flux (Na2O2 + sodium carbonate = 2 + 1), full mixing, cover 1 g mixed flux. Melting at 800 degrees Celsius is about 15min.
Cooling the melt, the crucible into a 600mL beaker, add 100mL water, boil a few minutes, the leaching of molten material. Use hot water to wash out the crucible, and the washing liquid is added to the solution. Retaining crucible. The cooling solution with Filterpaper filter (20g/L) with sodium hydroxide solution, washed 2 times, discarding the filtrate.
The paper on the precipitation by water jetting washing into the original beaker, add 10mL of hydrochloric acid, heated dissolution and precipitation. Solution with the original filter paper filter, with hot hydrochloric acid (1+1) wash filter paper 3 times, with hydrochloric acid (1+50) wash several times, and finally with warm water to wash the lotion is no acid. The filtrate and washings were collected at 600 mL beaker, this is the main liquid. Dissolve the residual melt in the crucible with hot hydrochloric acid (1+1) and wash the liquid in the liquid. Evaporation under non boiling condition to about 100mL.
Nanjing Ning Bo Analytical Instrument Co., Ltd.
2016.06.29

TypeInfo: Industrial News

Keywords for the information:Ning Bo element analyzer  Computer multi element analyzer