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ชุดทดสอบไนเตรทในน้ำ (0 -120 ppm.)

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VISOCOLOR® ECO NitratePrinciple:

Colorimetry with colour comparison card

• visual and photometric evaluation (with PF-11 / photino)
• environment-friendly, without toxic reagents
• economically priced
• convenient handling
• higher accuracy and sensitivity
• with pictographic instructions
• reagent bottles with clear dosing instructions
• compensation of turbidities and colours
• refill packs available

Colorimetric determination of nitrate

Nitrate is reduced to nitrite with an inorganic reducing agent. Nitrite is then diazotised with an aromatic amine and simultaneously coupled to form an azo dye.
Nitrite interferes (same reaction), but can be eliminated by boiling with amidosulphuric acid (Cat. No. 918 973). Oxidising substances such as chlorine can lower the result or completely inhibit the reaction depending on their concentration.

Data and ordering information
Cat. No. 931 041 (931 241)
Type colorimetric test kit (refill pack)

0 · 1 · 3 · 5 · 10 · 20 · 30 · 50 · 70 ·
90 · 120 mg/l NO3-

Sufficient for 110 determinations
Shelf life at least 18 months
Sea water suitability


Detectable with PF-11 yes

Nitrates occur in most ground and surface waters in concentrations of up to 20 mg/l. In addition to mere geological influences nitrate concentrations can also increase from agricultural sources (fertilisers). The VISOCOLOR® test kits are intended for the determination of nitrate in surface and drinking water and in industrial waste waters which do not contain high concentrations of interfering ions.


  • Requesting a Quotation and Ordering Products

    131 Thailand Science Park. Innovation Cluster 1 Building,

    Klong 1, Klong Luang, Pathumthani 12120 Thailand. 

    Tel.  02-191-3928 Fax 02-191-3929

    For more information please contact 081-847-6768 (Ms. Nareerat) IDLine: @alltestkit

    E-mail :


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