YSI pHotoFlex Series - Manual (Page 16)

16 ba76126e01 03/2013
YSI model no.: MCA-1 TP
Category: RT (reagent test)
Cell: 28 mm
Measuring range: 0.010 - 0.500 mg/l NH
3
-N (f)
0.012 - 0.610 mg/l NH
3
(f)
Display in mmol/l possible
Perform a zero
adjustment using a
28 mm cell filled with
sample. Pipette 10.0 ml sample
into an empty 28 mm
cell. Add 1 drop of Free
Ammonia Reagent
solution, close the cell
with the screw cap and
mix. Allow to react for 5
minutes. Add the contents of a
Vario Monochlor F
RGT powder pack and
close the cell with the
screw cap.
Note: Failing to restore
the zero adjustment
will result in all future
measurements being
erroneous!
Shake the cell vigorously
for about 20 seconds to
dissolve solids. Allow to react for 5
minutes. Insert the cell in the
photometer cell shaft
and start measurement. When switching to
another program restore
the zero adjustment by
performing a new zero
adjustment using a
28 mm cell filled with
deionized water.
Notes:
• Collect samples in clean glass bottles and analyze as soon as possible.
• The 5 minutes reaction times refer to a sample temperature of 18-20 °C (64-68 °F).
For other sample temperatures adjust the reaction time according to the follwing table:
• We recommend to determine a new reagent blank value (deionized water instead of sample) for each test package started.
5:00
5:00
Sample temperature Reaction time
(minutes)
Sample temperature Reaction time
(minutes) °C °F °C °F
5 41 10 20 68 5
10 50 8 23 73 2.5
16 61 6 25 77 2
Ammonia (free)
Program no.
347
*RN347*