EQUIPMENT AND REAGENTS
EQUIPMENT
1.Spectrophotometer with an infrared phototube for use at 880 nm with a light path of at least 2.5 cm (1 in)
2.Acid washed glassware
3.An analytical balance capable of weighing to 0.1 mg accuracy
REAGENTS
1.Sulfuric acid solution 5 N
2.Potassium antimonyl tartrate solution
3.Ammonium molybdate Solution
4.Ascorbic acid solution
5.Combined reagent
6.Standard phosphate solution