A positive is: usually accurate - unless you let it sit too long before you read it and the material becomes concentrated or an evaporation line formed. You can always repeat to make sure.
Answered 5/29/2015
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4 doctors weighed in across 2 answers
A doctor has provided 1 answer
3 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
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