end. Rotate the chamber cleaner in the same manner and leave it in
the sample port until your next test. (See Chapter 5, Chamber
cleaning.)
Advanced
®
Micro-Osmometer Model 3320 User’s Guide
Repeatability Tips
• Treat all samples, as well as standards and reference solutions,
uniformly before the test.
• Microsamples are more susceptible to contamination and evapo-
ration than larger samples. Avoid leaving sample containers
open. Cold samples are susceptible to condensation; warmer
samples are susceptible to evaporation.
• Only use the sampler either supplied with your instrument or list-
ed in the parts and accessories section of this user’s guide. Each
sampler comes with specific operating instructions and re-order
information.
• Cross-contamination from previous samples can affect the result
obtained from a subsequent test. To minimize this effect when
testing samples whose expected range is appreciably different
from that for previous tests, run two or more replicates of the new
sample and disregard the first result. Also, be sure to clean the
cooling chamber and sampler properly after each test.
• If an occasional sample produces irregular results, discard obvi-
ously discrepant readings as long as the instrument has been pro-
ducing accurate readings repeatedly. Repeat the sample in ques-
tion.
• For repeat runs, use additional samples from the same source.
• Proper cleaning of the cooling chamber between tests is very
important. Follow the procedure given in this chapter. Never
inject anything into the cooling chamber.
14
To Next Page
Loading...
Need help?
General
