This document is an instruction manual that mainly introduces the use and precautions of HI 38067A-0 Silica Reagent.
This document is the instruction manual for the Hanna Instruments HI 38067 Silica High Range Test Kit. It provides step-by-step procedures for determining silica concentration in water samples using a colorimetric method adapted from ASTM D859. The kit includes reagents, glassware, and a checker disc for reading results.
| Range (Low) | 0 to 40 mg/L (ppm) as SiO2 |
|---|---|
| Range (High) | 0 to 800 mg/L (ppm) as SO3 |
| Smallest Increment (Low Range) | 1 mg/L (ppm) SiO2 |
| Analysis Method | Colorimetric |
| Sample Size (Standard) | 5 mL or 0.25 mL |
| Number of Tests per Kit | 100 |
The determination of silica concentration uses an adaptation of the ASTM D859 method of the heteropoly blue method.
Interferences include phosphate above 50 ppm, sulfide, high dissolved salts concentration, and high concentration of iron.
The disc should be kept protected from light in a cool and dry place when not in use.