HI-93705-01 Silica Low Range Reagent, Heteropoly Blue Method

The HI-93705-01 are high quality reagents that are pre-measured, allowing for users to achieve fast and accurate colorimetric measurements. These reagents follow the ASTM D859 Heteropoly Blue Method in which the reaction between silica and reagents causes a blue tint in the sample. By first adding 6 drops from the bottle of HI-93705A reagent to the sample followed by the addition of two powder packets, the reaction will take place and one of Hanna’s compatible benchtop or portable meters will determine the concentration from the colour that is produced. The results will be displayed in mg/L (ppm) of silica. These reagents are designed to be used with samples that have an expected range of 0.00 to 2.00 mg/L silica.

Tip for an accurate measurement

It is important that the sample does not contain any debris.

When the cuvette is placed into the measurement cell, it must be dry outside and completely free of fingerprints, oil or dirt. Wipe it thoroughly with HI-731318 or a lint-free cloth prior to insertion.

Shaking the cuvette can generate bubbles, causing higher readings. To obtain accurate measurements, remove such bubbles by swirling or by gently tapping the cuvette.

Do not let the reacted sample stand for too long after reagent is added, or accuracy will be lost.

After the reading, it is important to discard the sample immediately, otherwise the glass might become permanently stained.