What is the minimum sample volume I can use in an Optocomp?
For the Optocomp I and II; anywhere from virtually no sample up to about 1.5 ml (1,500 microliters) will work well. Above about 1.5ml part of the sample will not be directly exposed to the PMT, however this may not affect your results, as long as all of your samples are the same volume and are reasonably homogeneous. Sample volumes above 1.5ml are not an issue if you are not attempting to quantify the analyte. For the Optocomp P the range would be from virtually no sample up to about 1.1ml (1,100 microliters).
