MACHEREY-NAGEL VISOCOLOR ECO Test kit Fluoride Refill

MACHEREY-NAGEL VISOCOLOR ECO Test kit/ Fluoride Refill

VISOCOLOR ECO presents a product group of colorimetric and titrimetric test kits which avoids hazardous substances wherever possible. With VISOCOLOR ECO even water constituents with low limiting values can be determined with sufficient accuracy. All VISOCOLOR ECO test kits are packed in an environment-friendly box and contain easy to understand instructions in 6 languages.

Colorimetric Tests
Principle: Colorimetry with color comparison card

• visual and photometric evaluation
• (with PF-12 / photino)
• environment-friendly
• economically priced
• convenient handling
• higher accuracy and sensitivity
• with pictographic instructions
• reagent bottles with clear dosing instructions c
• ompensation of turbidities and colors

Titration Tests
Principle: Titration with drop counting

• visual evaluation
• environment-friendly, without toxic reagents
• economically priced
• convenient handling
• higher accuracy and sensitivity
• sharper color change due to separated
• dropping reagents
• reagent bottles with clear dosing instructions

MACHEREY-NAGEL VISOCOLOR ECO Test kit Fluoride Refill
Photometric determination of fluoride

Photometric determination of fluoride with 1,8-dihydroxy-2-(4-sulfophenylazo)naphthalene-3,6-disulfonic acid (SPADNS) with the photometer PF-12.

The test is delivered without color scale and can be evaluated only with the photometers PF-12!

Normally, the content of fluoride in surface and ground water is lower than 1 mg/l. Permanent consumption of water containing more than 2 mg/l fluoride can cause a drinking water fluorese (a stained discolouration of the tooth enamel). On the other hand a content of fluoride lower than 0.5 mg/l could lead to an increasing risk of caries. The optimal content of fluoride in drinking water is about 1 mg/l. To avoid problems with caries in some countries the content of fluoride in drinking water is artificially increased. However, WHO and EC drinking water regulations recommend a threshold value of 1.5 mg/l F^-.

In some European countries, the threshold value for mineral water is also 1.5 mg/l F^-. For the suitability of water for the preparation of baby food a threshold value of 0.7 mg/l F^- is recommended. Natural mineral waters with a fluoride content of more than 5 mg/l must be labelled with a warning.