The use of single-chip computer makes the operation more simple, adjusting 0% T and 100% T is only a gentle click.

Four measurement modes, T, A, C and slope method, make the operation easier.

31/2 LCD liquid crystal display is easy to read, and large sample room can expand the function.

It can be equipped with 100mm colorimetric dish rack, which is more suitable for content analysis in water plants and power plants.

It can be equipped with a printer and the measured data can be printed and saved more conveniently.

Its excellent stability is suitable for food safety detection and pesticide residue analysis.

The light source is 6V10W imported 2000-hour long-life tungsten halide lamp.

Reagents required:

1. Hydrofluoric acid (GB/T 620): 40% (mass fraction).

2. Sulfuric acid solution: c(1/2H2SO4) = 10 mol/L, take the amount of concentrated sulfuric acid (GB/T 625) 278 mL and slowly add to appropriate amount of water, stirring while adding, and then dilute to 1000 mL with water.

3. Sulfuric acid solution: c(1/2H2SO4) = 7.2 mol/L, take 200 mL concentrated sulfuric acid, slowly add appropriate amount of water, stir while adding, and then dilute to 1000 mL with water.

4. Ammonium molybdate-sulphuric acid solution: 17.2 g ammonium molybdate (GB/T 657) was dissolved in a suitable amount of sulphuric acid solution (4.3) and diluted to 1000 mL with sulphuric acid solution (4.3).

5. Ascorbic acid solution: 5 g ascorbic acid is weighed and dissolved in 100 mL water. It is now ready-made.

6. Antimony potassium tartrate solution: 0.34 g of antimony potassium tartrate was dissolved in 250ml water.

7. Mixed solution: add 10 ml ascorbic acid solution (4.5) and 5 ml antimony potassium tartrate solution (4.6) to 35 mL ammonium molybdate-sulphuric acid solution (4.4), mix well and prepare when used.

8. Standard phosphorus reserve solution (0.1mg/mL): 0.4392g of high-grade pure potassium dihydrogen phosphate (GB/T 1274) dried for 1 hour at 110 C was accurately weighed and dissolved in water, and diluted to 1000 mL with water.

9. Standard working solution of phosphorus (0.01 mg/mL): 10.0 mL standard reserve solution of phosphorus (4.8) was diluted to 100 mL with water and prepared when used.

Coal phosphorus analyzer supporting equipment:

1. Electronic balance

2. Muffle stove

3. Dryer

4. Electric heating plate