18
Cyanuric Acid
Range: 2 – 200 mg/l
Wavelength – 530 and 575 nm
Method – Turbidity
1 Fill test tube with sample to the 10 ml mark.
2 Add one Cyanuric Acid tablet and allow to disintegrate
for at least two minutes.
3 A cloudy solution indicates the presence of cyanuric
acid.
4 Crush any remaining undissolved tablet and mix to
ensure uniformity.
5 Take the photometer reading.
Reagents
AP 087 – Cyanuric Acid Tablets
19
Alkalinity (Total)
Range: 10 – 500 mg/l
Wavelength – 575 nm
Method – Acid and Indicator
1 Fill test tube with sample to the 10 ml mark.
2 Add one Alkaphot tablet, crush and mix until all the
particles have dissolved. It is important to ensure
that all of the tablet particles have dissolved
otherwise the result may be inaccurate.
3 Stand for one minute.
4 Take the photometer reading. The reading
represents the total alkalinity of the sample as
milligrams per litre (parts per million) CaCO
3
.
Reagents
AP 188 – Alkaphot Tablets
Notes
For accurate results with Alkaphot, crush the tablet very
thoroughly, stand for one minute and then remix the
solution. Look carefully at the bottom of the tube. If a
thin yellow layer forms, then mix the tube again. This
ensures that reaction is complete. The result should not
change on standing.
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