6
PFP7/REV C/01-08
1.3
Specification
PFP7
PFP7/C
Ranges:
-
120-160 mmol/l Na (linearised)
0-10.0 mmol/l K
Limits of Detection:
Na
≤
0.2ppm
-
K
≤
0.2ppm
-
Li
≤
0.25ppm
Li
≤
0.25ppm
Ca
≤
15ppm
Ca
≤
15ppm
Ba
≤
30ppm
Ba
≤
30ppm
Reproducibility:
≤
1% Coefficient of variation (C.V.) for 20 consecutive samples
using 10ppm Na set to read 50.0.
Readings taken at 20 second intervals.
N.B. C.V. is defined as: the sample standard deviation X 100
mean reading
And sample
standard deviation as:
Where x is the reading, x is the mean readings of the series and n is
the number of readings.
Linearity:
Better than 2% when concentration of 3ppm Na and K and 5ppm Li
are set to read 100.
Specificity:
Interference from Na, K and Li when equal in concentration to the
test element will be less than 0.5%.
Stability:
Better than 2% over 5 minutes when continuously aspirating 10ppm,
sample set to read 50.0.
Zero drift better than 2% per hour.
N.B. Note warm up requirement.
Sample
Requirements:
Between 2 and 6ml/minute.
Recorder Output:
Nominal 1.00 volt for readout of 100.0.
Warm Up:
The flame must be alight for at least 15 minutes to ensure
achievement of the above stated specifications.
Services:
Electrical:
90-125V or 190-250V @ 50/60Hz.
Air:
Moisture and oil-free.
6 litres/minute at 1kg/cm
2
(14psi).
Fuel:
Propane, butane, natural gas or L.P.G.
Operating
Environment:
15ºC to 35ºC
Size:
420 x 360 x 300mm
Weight:
8kg
(x-x
2
)
n-1
√
(x-x
2
)
n-1
√
(x-x
2
)
n-1
√