Section 7: Conclusion & Recommendations

7.1 The titrimetric procedure described above gives a satisfactory measure of the phosphorus content of detergents at the 5% P₂O₅ level. The procedure is time consuming but it can be carried out using a minimum of equipment. The equipment required is that normally found in a small chemical laboratory.

7.2 A somewhat more precise and accurate determination can be carried out by the use of an automated colorimetric method, however, the necessary equipment is relatively expensive. For this reason it is recommended that the titrimetric procedure be used as the standard method for the determination of phosphorus in detergents.