Guide for preparion of standard solution
Posted: Tue Aug 30, 2011 8:12 pm
Friend of mine looking for guide for preparation for standard solution. Two main topic should described:
1. what MAXIMUM dilution factor should be used (10x, 100x, 1000X) in preparation of working solution from stock solution ?
2. why using very small volumes of pipette (like 1 ul) can cause errors?
Above problems are relatively obvious, but I can not find any OFFICIAL document (FDA, EPA, ISO.???) describing it.
Thanks in advance!
1. what MAXIMUM dilution factor should be used (10x, 100x, 1000X) in preparation of working solution from stock solution ?
2. why using very small volumes of pipette (like 1 ul) can cause errors?
Above problems are relatively obvious, but I can not find any OFFICIAL document (FDA, EPA, ISO.???) describing it.
Thanks in advance!