ICS-90 Ion Chromatography System
B-30 Doc. 031851-05 12/04
Volumetric Method 2: Using a Graduated Cylinder
a. Disconnect the
ELUENT IN line from the ELUENT IN port on the
suppressor.
b. Using a clock or watch with a second hand (the computer’s clock can be
used), collect eluent from the
ELUENT IN line into a small graduated
cylinder for 2 minutes.
c. The collected eluent should be approximately equal to the desired flow
rate in milliliters per minute. For example, for a flow rate of 1 mL/min,
2.0
± 0.2 mL should be collected in 2 minutes.
d. If necessary, adjust the flow rate knob, and then repeat the measurement.
Continue adjustments until the desired eluent per minute is collected.
e. Reconnect the
ELUENT IN line to the suppressor.
Gravimetric Method
a. Disconnect the
ELUENT IN line from the ELUENT IN port on the
suppressor.
b. Using a tared beaker and a calibrated stopwatch, collect the eluent from
the
ELUENT IN line for 60 seconds.
c. Weigh the mass of the eluent. The mass (in grams) should be
approximately equal to the desired flow rate in milliliters per minute. For
example, for a flow rate of 0.5 mL/min, the mass of the collected eluent
should be 0.5
± 0.02 g.
d. If necessary, adjust the flow rate knob, and then repeat Steps b and c.
Continue adjusting until the desired mass per minute is collected.
e. Reconnect the
ELUENT IN line to the suppressor.
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