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1.1 The method is performed according to the Merck Spectroquant® Phosphate Cell Test instructions as outlined in Appendix 1. The method is applicable to the determination of orthophosphate and total phosphorus in drinking, surface, seawater, domestic and industrial wastes. This test is also suitable for nutrient solutions for fertilization, soils and food after appropriate sample pre-treatment.

APHA 4500-P E - Phosphorus / Ascorbic Acid Method



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