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Sodium alginate

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Textile printing grade sodium alginate
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Food grade sodium alginate

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pharmaceutical grade sodium alginate
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potassium alginate

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alginic acid

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mannitol
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Iodine
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Sodium alginate pH value detection method

Release date:2013-04-08


  1. Principle:
    Different viscosity of the aqueous solution of sodium alginate on the pH glass electrode and calomel electrode produce different dc emfs, indicating its pH value through the amplifier.
  2. Instruments:
    Acidity meter: accuracy of 0.01 pH unit.
  3. Reagents:
    Experimental water Should accord with the requirement of tertiary water in GB6682.
  4. Measuring steps:
    ㈠.Preparation of 1% sodium alginate solution: according to take a sample of 1 g (called a quasi to 0.01 g), add 99 ml of distilled water, stirring to dissolve into a homogeneous solution, the solution concentration was 1%.
    ㈡.The determination of pH :According to the provisions of the ph meter to use ,Acidity meter calibration first, Then with a capacity of 100 ml beaker containing 1% sodium alginate solution 50 ml , The electrodes immersed in the solution,Start the acidity meter, Determination ofsolution pH .Shaking when measuring solution, when the pointer or display value stable reading.
  5. The results calculated :Each sodium alginate sample take for determination of two parallel samples,Take the arithmetic mean value as result.
  6. Repeatability :Two parallel samples results difference (absolute value) must not exceed 0.10,
    Otherwise renewedly prepared solutio .
Lianyungang huanyu seaweed co., LTD. Mainly produces sodium alginate
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