Repeatability of injection [August 11, 2004]
Posted: Sun Aug 29, 2004 6:41 pm
By Anne on Wednesday, August 11, 2004 - 07:28 pm:
I have this impression that for the same sample, the %RSD of 6 injections should be lower than that of 3 injections. Generally speaking, am I right or wrong? Would appreciate if any of you could help and provide the reference about this. Thanks in advance!
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By bert on Thursday, August 12, 2004 - 05:41 am:
Anne,
look at the formula to calculate the standard deviation; if n increases, SD decreases.
hope this will help.
Ber
I have this impression that for the same sample, the %RSD of 6 injections should be lower than that of 3 injections. Generally speaking, am I right or wrong? Would appreciate if any of you could help and provide the reference about this. Thanks in advance!
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By bert on Thursday, August 12, 2004 - 05:41 am:
Anne,
look at the formula to calculate the standard deviation; if n increases, SD decreases.
hope this will help.
Ber