Trace2O AquaSafe WSL25 Plus, Instruction Manual

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Insert the comparator disc for Nitrate into the recess on the right hand side of the comparator with the numbers
facing forwards as shown in fig 1.0
Fill the two vials to the 10ml mark with sample water.
Place one in the left side of the comparator as shown in fig 1.1. This is the reference cell.
Sample preparation:
•
Fill the nitrate test tube with 20ml of the water sample
•
Add 1 level spoon of Nitrate Test Powder (using the spoon attached to the lid of the powder pot)
•
Fit the cap and swirl vigorously for one minute.
•
Add one Nitrate Test tablet straight from the foil to the nitrate test tube. Do not crush the tablet.
•
Refit the cap and swirl vigorously for 1 minute.
•
Stand the tube upright, allow contents to settle, then invert gently 3 to 4 times.
•
Allow to stand for a further 2 minutes, then open and wipe carefully around the rim to remove solid
particles.
•
Tip 10ml of the sample from the Nitrate test tube into the second 10ml sample cell
•
Add one Nitrite LR tablet straight from the foil to the water sample in the second cell.
•
Crush the tablet using a clean stirring rod, until no large pieces are visible.
•
Fit rubber stopper to the cell and invert several times until the tablet is dissolved.
•
Leave the sample to stand for 10 minutes.
Analysis: