Analysis method of manganese, phosphorus and silic

Methods for analysis of manganese, phosphorus and silicon in iron and steel

1. Dilute nitric acid (1+4) 100ml nitric acid +400ml distilled water

2. Potassium permanganate solution (5%) 5g potassium permanganate +100ml distilled water

3. Alkaline ammonium molybdate solution: combine the volumes of ammonium molybdate solution (5%) and potassium carbonate solution (12.5%) and store them in plastic bottles for future use. 25g ammonium molybdate +62.5g potassium carbonate +500ml distilled water

4, oxalic acid (2.5%). 12.5g oxalic acid +500ml distilled water

5. Ammonium ferrous sulfate solution (1%), weigh 5g of ammonium ferrous sulfate, add 5ml of concentrated sulfuric acid, mix well, and then add distilled water

500ml

II. Operating steps:

take 50mg of the sample, add it to a 250ml high beaker, add 10ml of preheated dilute nitric acid (1+4)

, dissolve the sample, remove the nitriding gas, add 3 drops of potassium permanganate solution (5%), and continue heating and boiling, Immediately

add 10ml of alkaline ammonium molybdate solution. After shaking for 10 seconds, add 40ml of oxalic acid (2.5%) and 40ml of ferrous ammonium sulfate solution (1%). Shake well and test on the computer

determination of manganese (silver permanganate photometric method)

I. reagent:

1. Manganese determination mixture: 100ml nitric acid + 400ml distilled water + 2G silver nitrate

2. Ammonium persulfate solution (15%) 30g ammonium persulfate +200ml distilled water

II. Operating steps:

weigh 50mg of the sample and place it in a 250ml high beaker, dissolve 10ml of the preheated manganese determination mixture, and after the sample is dissolved, add 5ml of ammonium persulfate solution (15%), shake it well, add 40ml of water, place it for several minutes, and test it

III. precautions

1. Shake well after adding ammonium persulfate

1. When recording the content, wait for a small amount of small bubbles to escape

determination of phosphorus (sodium fluoride stannous chloride phosphomolybdenum blue photometric method)

I. reagent:

1. Dilute nitric acid (1+2.5) 100ml nitric acid +250ml distilled water

2. Potassium permanganate solution (5%) 5g potassium permanganate +100ml distilled water

3. Ammonium molybdate potassium sodium tartrate solution: take an equal volume of ammonium molybdate (10%) and potassium sodium tartrate (10%)

and mix them. 10g ammonium molybdate +10g potassium sodium tartrate +200ml distilled water

4. Sodium fluoride stannous chloride solution: 24g of sodium fluoride is dissolved in 1000ml of water and heated for dissolution. It is used for standby. On the same day, add 1g of stannous chloride, 2.5ml of hydrochloric acid (1+1), heat to dissolve, and 500ml of sodium fluoride. (1+2.5+500)

II. Operating steps

weigh 50mg of the sample, place it in a 250ml high beaker, add 10ml of preheated dilute nitric acid (1+2.5),

heat it until the sample is dissolved, escape the nitride gas, add 6 drops of potassium permanganate (5%), continue to heat

until it boils, add 10ml of ammonium molybdate sodium potassium tartrate, shake it up, and add 40ml of sodium fluoride chloride

stannous solution. The plate spring will also be mixed in S60, S90 and V90.60 V90 and XC60 water are used as reference to measure their content. Many power battery industrial parks and bases in China are in shutdown or semi saturated state

III. precautions

1. During oxidation, the boiling of Part 1 of the solution aluminum-plastic composite pressure pipe

2. The analysis and operation procedures shall be relatively consistent. To ensure the reproducibility and accuracy of the analysis results

3. When the content is greater than 0.05%, the reading time is short and cannot be delayed

if you have any technical problems, please contact the technical personnel or call after-sales service.

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