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含水量測定儀 ( 萬用型 )

AQUA 40.00 Vario 型號:AQUA 40.00 Vario
固體、糊狀樣品、油類的水含量,也適用於吸濕性樣品。用於較大的樣品量(0.5至100mL),可作為手動版本或與自動進樣器一起使用,適用於2R至50R的小瓶(加熱溫度高達300℃)
  • Water content of all types of samples

    - Closed-loop circulation of extraction gas
    - Manual and automatic version available
    - Easy to adapt to different vial sizes

    The AQUA 40.00 Vario combines the Karl Fischer Titration with the headspace technique. This offers a wide range of interesting applications to determine moisture in solid and pasty samples, oils and viscous compounds.

    The sample preparation takes place using the dynamic headspace technique. The sample - in a closed vial - is placed into the headspace oven and tempered.

    A closed-loop gas circulation with dry carrier gas flows across the sample and transports the extracted water completely into the measuring cell, where the analysis is carried out by titration according to the Karl Fischer method.

    It does not require time-consuming sample preparation:
    - Weigh out the sample into the headspace vial and close it
    - Place the vial in the device (manually or automatically)
    - Prepare the measurement and start it

    Distinction of binding forms

    Temperature-controlled heating procedure, e. g. with temperature program, can be defined individually by the user. Such a temperature program reveals in which way the water in question is bonded to the sample substance. You can distinguish between chemically bonded water of crystallization and adsorbed surface water.

    Closed-loop gas circulation

    The system has the unique advantage of circulating the extraction gas in a closed loop. Any additional gas drying is not necessary. The internal carrier gas for the extraction is continually titrated to dryness within the closed loop. The total dryness of the gas enhances the moisture release from the sample. Sensitive samples can be heated out very gently. All these advantages result in reducing reagent consumption considerably.

    Applications

    • Pharmaceutical products
    • Biological substances
    • Plastics
    • Hygroscopic compounds
    • Freeze-dried products, e. g. lyophilized cultures
    • Oils and lubricants, creams, pastes
    • Viscous materials (bitumen, tar, sludges)
    • Powder and pellets
    • Food
    • Petrochemicals

    Advantages

    • Reduced reagent consumption
    • Additional gas drying is not required due to closed-loop circulation of extraction gas
    • No evaporation of methanol from reagents
    • Temperature programmed procedures
    • Short measuring times of complex samples
    • Stand-by titration for automated conditioning and easy blank tests
    • Suitable for 2 R – 50 R vials
    • Easy automation with autosampler
    • Software complies with requirements of FDA to 21 CFR Part 11 (Software with user-specific access, routine methods for individual and definable user levels, profound documentation and archiving of all measured data)
    • Priorized express samples can set individually by user
    • Automatic identification of interchangeable oven and sample plate of the autosampler
  • Sample vial: headspace vials (size 2 R – 50 R)
    Measuring range: 1 µg – 100 mg, absolute
    Resolution: 0.1 µg
    Reproducibility: ± 3 µg for 10 … 1000 µg 3 % for > 1 mg
    Temperature range: 35 °C ... 300 °C (isothermal or temperature programmed)
    Power supply: 230 V, 50/60 Hz; 115 V, 50/60 Hz
    Power input: 250 W
    Dimensions/Weight: Manual version:
    300 x 450 x 240 mm (W x H x D)/7 kg
    Autosampler version:
    420 x 450 x 460 mm (W x H x D)/17 kg
    Device control: PC software (PC not included in the scope of delivery)