LCK541 Nitrite Cuvette Test, 0.0015-0.03 mg/L NO₂-N

LCK541 Cuvette test (13mm) measures 0.0015-0.03 mg/L NO₂-N and 0.005-0.100 mg/L NO₂ in wastewater, drinking water, table water and other liquids. The product uses diazotisation method (EN ISO 26777, DIN 38405 D10). Article LCK541 may be used to conduct up to 50 tests. LCK reagent set can be evaluated on DR3900, DR6000, DR2800, DR3800 and DR5000. LCK541 Cuvette test includes reagent set and LZP341 (50mm semi-micro plastic cuvettes).

Mix MicroCap A, 0.5 mL solution B and 5.0 mL sample in the 50 mm plastic cuvette (LZP341). Prepare the blank by pipetting 5.0 mL sample into the second 50 mm plastic cuvette and inserting the blank into the 50 mm rectangular cell holder. Remove the blank and evaluate results of the wastewater, drinking water or other liquid sample using one of the aforementioned instruments. Nitrites are reacting with primary aromatic amines in acidic solution to form diazonium salts. These salts combine with aromatic compounds that contain an amino group or a hydroxyl group to form intensively colored azo dyes. Chromium(VI) and Copper(II) ions interfere with the determination. The analysis must only be carried out with plastic cuvettes (LZP341). Plastic cuvettes should not be used more than 5 times. Carbonated water should be degassed before the analysis is carried out. For error-free evaluation it is important that there are no air bubbles in the beam path.

The conservation of the sample containing nitrite for short-term or long-term period is not recommended. Maximum 3 hours should elapse between sampling and analysing the sample. The water sample must be stored in glass or polyethylene (PE) container. LCK541 reagent kit temperature storage conditions are between 2 °C and 8 °C.