HYDRANAL-Solubilizers, Buffers, Drying Agents and Moisture Test Kit
In special cases, the addition of solubilizer is required in order to enable a direct titration of the sample and avoid complicated and error-prone pre-dissolution and pre-extraction steps.
The Karl Fischer reaction is pH dependant, with pH 5-7.5 being the ideal range. Strongly acidic samples slow the reaction and must be neutralized without inducing an alkaline reaction of the working medium prior to starting the titration. Strong bases can increase the pH of the working solution if the basicity exceeds the buffering capacity of the reagent. A titration end point will not be reached. Strong bases also must be neutralized prior to starting the titration.
Special drying agents are suitable to hold the near environment of the Karl Fischer equipment on a low water level or to dry carrier gases in case of oven technique.
For rough measurements without a titrator, special test kits for visual water determination according to Karl Fischer can be used. The set contains syringes, titration vessel and reagents: 2 x 500 mL Hydranal-Solvent E (34730), 100 mL Hydranal-Titrant 5 E (34732) and 100 mL Hydranal Test Solution 5.0 (34813). Refills can be ordered separately.
PRODUCT: 34724
PRODUCT NAME: Hydranal™-Formamide Dry
DESCRIPTION: Solubilizer, max. 0.02% water
PACKAGING: 1 L
PRODUCT: 37863
PRODUCT NAME: Hydranal™-Chloroform
DESCRIPTION: Solubilizer, max. 0.01% water
PACKAGING: 1 L
PRODUCT: 37866
PRODUCT NAME: Hydranal™-Xylene
DESCRIPTION: Solubilizer, max. 0.02% water
PACKAGING: 1 L
PRODUCT: 34804
PRODUCT NAME: Hydranal™-Buffer for Acids
DESCRIPTION: Liquid buffer medium, based on imidazole
PACKAGING: 500 mL
PRODUCT: 37859
PRODUCT NAME: Hydranal™-Buffer for Bases
DESCRIPTION: Liquid buffer medium, based on salicylic acid
PACKAGING: 1 L
PRODUCT: 32035
PRODUCT NAME: Hydranal™-Benzoic Acid
DESCRIPTION: Buffer substance
PACKAGING: 500 g
PRODUCT: 37865
PRODUCT NAME: Hydranal™-Salicylic Acid
DESCRIPTION: Buffer substance
PACKAGING: 500 g
PRODUCT: 37864
PRODUCT NAME: Hydranal™-Imidazole
DESCRIPTION: Buffer substance
PACKAGING: 500 g
PRODUCT: 34813
PRODUCT NAME: Hydranal™ Test Solution 5.0
DESCRIPTION: Test solution for volumetric titration, water content 5.00 mg/mL
PACKAGING: 100 mL; 500 mL
PRODUCT: 34803
PRODUCT NAME: Hydranal™-Sodium Tartrate Dihydrate
DESCRIPTION: Test substance for volumetric titration, water content ~15.66%
PACKAGING: 100 g
PRODUCT: 34802
PRODUCT NAME: Hydranal™-Water-in-Methanol 5.0
DESCRIPTION: Reagent for volumetric back titration, water content 5.00 mg/mL
PACKAGING: 500 mL; 1 L
PRODUCT: 34788
PRODUCT NAME: Hydranal™-Humidity Absorber
DESCRIPTION: Drying agent for air and gases with indicator
PACKAGING: 00 g; 1 kg
PRODUCT: 34241
PRODUCT NAME: Hydranal™-Molecular Sieve 0.3 nm
DESCRIPTION: Drying agent for air and gases
PACKAGING: 250 g
PRODUCT: 37858
PRODUCT NAME: Hydranal™-Moisture Test Kit
DESCRIPTION: Test kit for the visual water determination according to Karl Fischer without titrator
PACKAGING: 1 kit
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