ORBECO 942-095, Инструкция по эксплуатации

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A. Has the sample been taken correctly? Has it changed in value due to settling over time,
exposure to heat or cold, or was it kept in a container that may have contaminated it?
B. Were sample tubes clean and dry before use? Free of finger marks? Are sample tubes
scratched or stained? Are bubbles clinging to insides of tubes? Is condensation on outside?
Retest paying attention to these factors.
C. Have blank and sample tubes been filled to the 10mL mark? Are they positioned all the way
down in the tube well?
D. Is the reagent fresh or still valid? If questionable, retest with fresh reagent.
E. Reviewed any notes in the directions about possible interferences?
F. What are results being compared to that appear to signify questionable results? Are those
readings necessarily valid? Have you tested a sample of known value? Ask about our
selection of precise standard solutions.
When communicating with us about results, give complete details of all aspects of your observations, age
and condition of reagents used, type and description of samples being measured. Did you previously get
successful results?