In the malachite green method for measuring phosphorus concentration, what it the purpose of each of the following reagents? Include in your answer what would happen if you didn't use the reagent.
a) Malachite green
b) PVA
c) H2SO4
In the ascorbic method of analysis phosphorus,
a) What role does ascorbic acid play in the procedure?
b) Name three substances that are interferences in the method.