I was reading in a Instrumental Analysis book that TLC can be used for quantitative analysis. According to the book there are three ways. One is measuring the size of the spots, which is a rough estimate, second is extracting the spots from the plate and using some method to measure the amount, three is using a
scanning densitometer to measure the emission or something of the spot. Of these the scanning densitometer way sounds the most accurate and easy, but I don't know what that is. I looked up densitometer in the book and in other books but couldn't find it. Then I looked online and I ran into photography equipment. Does anyone know anything about this? Swim is particularly interested in measuring the purity of pills and of cocaine. Unfortunately the GC/MS machines available to swim all have recording software that records every spectrum recorded and every user must enter their account before taking any spectra. Since swim is a beginning user, he also must have another user present, with their username and password recorded also.
