This is an instruction manual about phosphorus test kit.
This document is the instruction manual for the Hanna Instruments HI 38073 Soil Phosphorus Test Kit. The kit includes a reagent packet (HI 93713-0), a checker disc, glass vials, and a syringe to measure soil phosphorus content using an adaptation of the ascorbic acid method.
The kit measures phosphorus levels from 0 to 130 mg/L (ppm).
You must add exactly 0.75 mL of sample to each glass vial.
After adding the reagent, shake the vial vigorously for 20 seconds.