Section 1
Introduction
1.1
Instrument description
The PFP7 and PFP7/C are low temperature, single channel emission flame photometers designed
for the routine determination of sodium (Na), potassium (K) and lithium (Li). Additional filters for
the determination of calcium (Ca) and barium (Ba) are supplied with the PFP7. Both versions are
fitted with an automatic flame failure detection for user safety, making them ideal for use in clinical,
industrial or educational applications. Model PFP7/C is specifically designed for use in clinical
applications. The in-built lineariser circuitry enables readings of both Na and K, at normal clinical
serum concentrations to be displayed directly in mmol/l. Serum samples must be diluted 200:1 or
100:1 prior to presentation to the flame photometer.
1.2
Specification
PFP7
PFP7/C
Ranges
0 to 199.9ppm
120-160 mmol/L Na (linearized)
0-10.0 mmol/L K
Limits of
Detection
Na
0.2ppm
Na
0.2ppm
K
0.2ppm
K
0.2ppm
Li
0.25ppm
Li
0.25ppm
Ca
15ppm
-
Ba
30ppm
-
Reproducibility
1% Coefficient of variation (C.V.) for 20 consecutive samples using
10ppm Na set to read at 50.0 (PFP7) or 140 (PFP7/C).
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 after
warm-up.
Sample
requirements
Between 2 and 6 ml/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 specification.
Services
Electrical:
90-125V or 190-250V @ 50/60Hz
Air:
Moisture and oil-free.
Fuel:
Propane, butane, natural gas or
L.P.G.
Operating
Environment
15
o
C to 35
o
C
Size
420 x 360 x 300mm
Weight
8kg
500 795/Rev E/03-17
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