Column, Cadmium, for Nitrate determination

Product #: 50237A
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Lachat Cadmium Columns (Product Number 50237A) are specialized, packed columns used on the Lachat Flow Injection Analyzer to reduce nitrate to nitrite for water quality testing.

Key Specifications & Maintenance

Function
Reduces nitrate (NO₃2-) to nitrite (NO₃2-) so it can be colorimetrically analyzed using the Greiss reagent. The Greiss reagent works via a diazotization reaction with nitrite to form a highly colored, pink/purple azo dye.

Efficiency
Calculated by dividing the nitrate response by the nitrite response:
E= (NO₃2-/ NO₃2-) x 100

Lifespan Tip
Adding 2 drops of 2g/100 mL copper sulfate solution per liter of buffer can extend column life by keeping the cadmium properly copperized.

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