Apparatus :

1Test Tube
1 Titrator

Reagents :

NITRITE REAGENT NO 1 ACID REAGENT
NITRITE REAGENT NO 2 TITRATOR REAGENT

Procedure :

1. Fill the Test tube to the 5ml. graduation mark with the water to be tested.
2. Add one spoonful of Nitrite Reagent No.1 to the measured sample. Insert the Test Tube Cap and shake the mixture until the powder has dissolved.
3. The Titrator is filled with Nitrite Reagent No.2 to the 'Zero' mark.
4. The Nitrite Reagent No.2 is added drop by drop, shaking gently, until a pink colour remains in the test mixture for 30 seconds. The result of the test is read from Titrator.
5. Result is obtained in p.p.m. Nitrite by multiplying the Titrator reading by 100. NOVACHEM 2000 test is based on the oxydation of sodium nitrite by potassium permanganate. This reaction only takes place in an acid environment - created by adding Reagent No.1. In case acid environment is not achieved the first drop of Reagent No.2 will result in a coloration of the water sample, suggesting the test is terminated, resulting in a zero reading for Nitrite content. In case of doubt check pH of water sample with paper. pH should be below 3. If higher add extra Reagent No.1 and proceed with test as usual.