K-9705 Thiosulfate

K-9705 Thiosulfate Titrets Kit was designed to obtain Thiosulfate levels ranging from 5-50 ppm

Thiosulfate Information


The K-9705 Thiosulfate Kit was designed to accurately measure the levels of Thiosulfate in water from 5-50 ppm. K-9705 uses the Iodometric MethodCHEMetrics' sulfite test kits employ the iodometric chemistry in which sulfite is titrated with iodide-iodate titrant in an acid solution using a starch indicator. Thiosulfate will titrate as sulfite. Sulfamic acid is added to the sample to prevent interference from nitrite. Results are expressed as ppm (mg/L) SO3.

Thiosulfate is an excellent reducing agent. It is used primarily as an antichlor, or chlorine-removing agent, in various chemical processes, including the bleaching of pulp, paper, and textiles

What's included:

  • 30 Ampoules with valve assemblies
  • Neutralizer Solutions
  • Titrettor
  • 25 mL Sample Cup
  • Instructions



How to use:

  1. Add 15 mL of sample into the empty sample cup. Fill the sample cup to 25ml  

  2. Add 5 Drops of A-9700 Neutralizer solution. Stir gently.
  3. If there is a possibility that nitrite is present, add 4 drops of A-9600 Neutralizer Solution. Stir gently. Wait 30 seconds.
  4. Snap the tip of the ampoule at the black snap ring.

  5. Lift the control bar and  insert the Titret assembly into the Titrettor.

  6. Hold the Titrettor with the sample pipe in the sample. Press the control bar firmly, but briefly, to pull in a small amount of sample. Contents will turn Blue. Wait 30 seconds.
  7. Repeat, mixing the assembly between each sample draw. 

  8. Tip the vacu-vial back and forth to mix
  9. Press the control bar again and mix the ampoule. Watch for color change from blue to colorless. 
  10. Repeat until the change to colorless is permanent to remove the ampoule and obtain results.


K-9705 Instructions

Thiosulfate Information


WARNING! This product can expose you to chemicals including formaldehyde, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.

More Information
Manufacturer CHEMetrics
Call For Price No
Gas Thiosulfate
4-20 mA Output No
Voltage Output None
Power Requirements 4 AAA Batteries
Datalogging No
Warranty 1 Year
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