HI-739-26 Fluoride HR Checker HC reagents for 30 tests (Fluoride HR)

These high-quality reagents are clearly marked with the lot number and expiry date on the bottle for traceability.

The HI-739-26 are high-quality reagents that are pre-measured, allowing for users to achieve fast and accurate measurements with their Fluoride High Range Checker® HC. These reagents follow the SPADNS Method in which the reaction between fluoride and the reagent causes a colourless complex in the sample. By simply adding 2 mL of SPADNS reagent to two cuvettes, and subsequently 8 mL of the second reagent to one and 8 mL of sample in the other, the reaction will take place and the HI-739 will determine the concentration from the colour that is produced. The results will be displayed in ppm of fluoride. These reagents are designed to be used with samples that have an expected range of 0.0 to 20.0 ppm (mg/L) fluoride.

Tip for an accurate measurement

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

Whenever 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.

Four steps. One click. Instant Readout.

1. ‘Zero’ the Checker®HC with your vial inside

2. Place a 10ml water sample into the vial and add your reagent

3. Place your vial into your Checker®HC

4. Press the button and read the results

Also available: HI-739-11 calibration set.