In HPLC, it is well known that system suitability parameters (including RSD of 5 or 6 replicate injections) apply to standard solution or system suitability solution.
Does test solution have any RSD requirement?
For example, if I got RSD result of 8 for 3 replicate injections of test solution, is that acceptable??
What is the limit for such a case??
Generally 5% is acceptable. For some apps like pharma it can be 3% or less. Often the procedure define the acceptable level.
Regards
GB
Standard deviation is used to test repeatability of the measurements or precision. Relative standard deviation is a measure of reproducibility of measurements among two or more sets of measurements for the same parameter and should be abysmally low if precision of higher order is expected.
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