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For samples with a water content greater than 0.1%. The amount of water is determined by volumetry, based on a redox reaction (Iodine/Iodide) sensitive to very low moisture levels.
Volumetric determination
481091.1611 and 285812.1610
The amount of iodine consumed in the titration is proportional to the water content of the sample.
The end point is detected by a double platinum polarized electrode.
In presence of a base and a solvent (i.e. imidazole and methanol)
I2 + SO2 + 2H2O ¡æ 2HI + H2SO4
The amount of iodine consumed in the titration is proportional to the water content of the sample.
The end point is detected by a double platinum polarized electrode.

There are two ways to perform this reaction: with one component reagents or with two components.

One component reagents
All the necessary reagents to perform the reaction (iodine, sulphur dioxide and imidazole) are present in the titrant reagent: AQUAMETRIC Composite.
The media generally used with these reagents is dry methanol.

Main advantages
Easy to use: All in onec
Flexibility to select the appropriate solvent (as media) to extract the water from the sample
Two component reagents
The reagents to perform the reaction are separate in two components:
AQUAMETRIC Titrant: Contains iodine dissolved in methanol
AQUAMETRIC Solvent: Media that contains the rest of necessary compounds (imidazole and sulphur dioxide in methanol)

Main advantages:
High stability and shelf life
Faster titration and high accuracy
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Thumbnail Catalog Description Packaging Specification
483101 Chloroform dry (max. 0.005% water) stabilized with ~ 50 ppm of amylene , ACS 1000ml CAS No. 67-66-3 / liquid / M.W 119.38 g/mol
481745 Toluene dry (max. 0.005% water) , ACS, ISO 1000ml CAS No. 108-88-3 / liquid / M.W 92.14 g/mol
481457 Pyridine dry (max. 0.01% water) , ACS 1000ml CAS No. 110-86-1 / liquid / M.W 79.10 g/mol
481091 Methanol dry (max. 0.005% water) , ACS, ISO 1000ml / 2.5L CAS No. 67-56-1 / liquid / M.W 32.04 g/mol
481086 Ethanol absolute dry (max. 0.02% water) 1000ml CAS No. 64-17-5 / liquid / M.W 46.07 g/mol
286154 AQUAMETRIC Solvent Oil B for volumetric analysis 1000ml liquid / Suitability: for H2O determination: passes test Close the bottle immediately after use. Protect from moisture.
285821 AQUAMETRIC Working Medium for volumetric analysis 1000ml liquid / Suitability: for H2O determination: passes test Protect from moisture.
285819 AQUAMETRIC Solvent CM for volumetric analysis 1000ml / 2.5L liquid / Suitability: for H2O determination: passes test Close the bottle immediately after use. Protect from moisture.
285817 AQUAMETRIC Solvent for volumetric analysis 1000ml / 2.5L liquid / Suitability: for H2O determination: passes test Close the bottle immediately after use. Protect from moisture.
285816 AQUAMETRIC Titrant 2 for volumetric analysis 1000ml liquid / 1 ml corresponds to:: min. 2,0 mg of H2O (20¡ÆC)* Protect from moisture. * At the moment of the batch analysis.

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