Elizabethtown College Department of Chemistry
Last Updated by KK 1/09
f.
adjust the penetration depth of the pipet in the graphite tube as described in the
HGA-800 Graphite Furnace System including the AS-72 Autosampler Hardware
Guide
, Section 2-30.
g.
adjust the penetration depth of the pipet in the sample cup as described in the
HGA-
800 Graphite Furnace System including the AS-72 Autosampler Hardware Guide
,
Section 2-32.
h.
Check the solution droplet delivery as described in the
HGA-800 Graphite Furnace
System including the AS-72 Autosampler Hardware Guide
, Section 2-34.
14.
Measure Blank, Standards, and Sample(s)
a.
Fill the sample cups in the autosampler with your blank, standard, and sample
solutions.
b.
Program the autosampler (as described by the instructor or in the software manual)
to obtain the desired number of replicate measurements for the blank, standards, and
samples.
c.
Record the peak areas in your notebook, and affix printed hard copies into your
notebook as well.
15.
SHUTDOWN PROCEDURES
a.
Flush the autosampler rinsing system with deionized water by selecting Flush
Sampler from the Furnace Control Window.Exit the software and Windows, and
turn off the graphite furnace unit, the spectrometer, the computer, and the printer.
c.
Turn off the water circulator.
d.
Turn off the argon gas supply.
e.
Wait until the regulator on the gas valve reads 0 before turning off the fume
ventilation system using the switch behind the instrument.
f.
Empty the drain vessel, being certain to dispose of waste properly.
g.
Remove all samples and reagents from the autosampler tray. Store samples and
standards or dispose of them properly. They should not be left near the instrument.
h.
Double check that you carried out each of steps 15a-g before exiting the lab.
ATTENTION:
Please report to Dr. Kneas any errors, sources of confusion, or suggested additions or
corrections to these operating procedures.
