microtest Nitrate-N NED (HS)
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microtest Nitrate-N NED (HS)
for the determination of Nitrate-N; 0.0 – 0.8 mg/L
Replacement reagents:
Set of 2 reagents ... $38.00 + GST (availability: next day)
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Product Details
| Product Code | 654100 |
| Contents | Reagent A, 15 mL Reagent B, 2 g Measuring spoon Test tube, 5 mL (2x) Colour chart I nstructions for Use |
| Analytical Method | Reduction to nitrite, diazotation / azocoupling: In acid conditions, nitrate is reduced to nitrite by metallic zinc. Then nitrite forms a diazo-compound with sulfanilamide. This diazo-compound reacts with N-(1-naphthyl)-ethylenediamine forming an intensely coloured pink azo dye, the intensity of which is related to the nitrite concentration. |
| Number of Tests | 70 |
| Interferences | Water constituents at concentrations commonly found in natural waters will not cause interferences. Oxidants like chlorine and ozone will interfere, causing low results. Nitrite will interfere seriously (same reaction). Seawater: Seawater and waters high in salinity will cause low results. In order to compensate for that, multiply reading by 1.5. |
| Measuring Range | The standard measuring range is 0 – 0.8 mg/L nitrate-nitrogen. The colour comparator has 5 colour fields: 0.05–0.1–0.2–0.4–0.8 mg/L. For higher nitrate concentrations, the sample has to be diluted. A 1:5 sample dilution can be carried out easily, thus extending the measuring range to 4.0 mg/L. |
| Shelf Life | 1 year |
| Applications | Determination and monitoring of nitrate levels in natural waters (environmental monitoring), waste water. |