Categories: Test Kit For Water-62
Product Short Description: Thioglycolate (thioglycolic acid) is used in water testing as a powerful reducing and complexing agent to measure both dissolved and total iron.
Product Description:

Thioglycolate (thioglycolic acid) is used in water testing as a powerful reducing and complexing agent to measure both dissolved and total iron. It works by reducing insoluble ferric iron (Fe³⁺) to ferrous iron (Fe²⁺) and binding with it to form a highly visible purple complex.

Thioglycolic acid is used for the reduction of iron(III) to iron(II), and for pH adjustment. Thus only one reagent is required for analysis.

Product Application:
How the Thioglycolate Method Works

 

  • Reduction: Thioglycolic acid reduces oxidized ferric iron (Fe³⁺) into soluble ferrous iron (Fe²⁺).

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  • Complexation: The ferrous iron reacts with the thioglycolate to form a purple or pink-colored ferrous thioglycolate complex.

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  • Measurement: The intensity of the resulting color is directly proportional to the total iron concentration in the water sample

    • Typical Testing Procedure
    1. Color Comparison: After a brief waiting period (usually 3 to 5 minutes), the color of the sample is compared against a standard color chart or measured photometrically to determine the iron level in mg/L (or ppm).
    Advantages and Limitations
    • Interferences: The formulation used in many test kits is designed to minimize interferences from other heavy metals that might be present in the water sample
    Product Dose:
    Typical Testing Procedure

     

  • Sample Preparation: A measured water sample is placed into a test tube or flask.

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  • Reagent Addition: Citric acid is often added first to prevent the precipitation of iron, followed by the thioglycolate indicator.

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  • pH Adjustment: Ammonia is added to make the solution alkaline. This step is crucial for the colored complex to form.

    Color Comparison: After a brief waiting period (usually 3 to 5 minutes), the color of the sample is compared against a standard color chart or measured photometrically to determine the iron level in mg/L (or ppm)

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    Product Note:
    A thioglycollate indicator (typically resazurin) is a redox dye used to visually map oxygen levels in bacterial culture tubes. 
    In its oxidized state, it turns pink when exposed to oxygen; in its reduced, oxygen-free state (typically at the bottom), it remains colorless.
     
    Resazurin Indicator Characteristics
    Pink Zone: Indicates the presence of oxygen (aerobic zone) at the top of the tube.
    Colorless Zone: Indicates the absence of oxygen (anaerobic zone) deeper in the tube.
    Reversibility: Resazurin is highly sensitive; if the broth is shaken, it re-oxidizes and the top portion will turn pink until the thioglycolic acid reduces the oxygen again
    Free Delivery / Supply Locations : 
    Oman, Bahrain, Abu Dhabi, Ajman, Al Ain, Dubai, Ras Al-Khaimah, Ras al Khaimah, Fujairah, Sharjah, Umm Al Quwain, Fujairah, Ruwais, Mina (Port) Zayed, Khalifa Port, Kizad, Port Rashid, Jebel Ali Port, DP WORLD, Jebel Ali Free Zone, Khor Fakkan Container Terminal, Port Rashid, Jebel Ali Port, Mina Kalid Port, Khor Fhakan Port ( Khawr Fakkan, Khawr al-Fakkan ), Sharjah Creek, Ajman, Port of Hamriyah, Mina Zayed Port, Mussafah port, Khalifa Port, Umm al-Nar Port, Um Al Quwain Port, Saqr Port, Port of Fujairah, Dibba Port, Jebel Dhanna, Mina Al Hamriya, Mina Rashid, All United Arab Emirates