bad for some... but will always be some difference between dry % and packed %
Professional Whey say for their WPI "91.6% dry basis, 88% as is..
even if the guy was not doing accurately, there is too big a range to be experimental error... ?
but seems odd that "american pure whey" has only 1% protein??
the rice protein was also 6% instead of 80%...
I do stuff like this sometimes (running semi-public tests of stuff at work, on metal, not protein) but it always comes with the caveat of "if you want real results, take it to real lab"
maybe his tests were not appropriate for checking content of all the different protein types?
a few links abotu his 280nm UV absorbance test
Measurement of protein concentration using absorbance at 280 nm
Protein Assay using UV-Spectrophotometer at 280 nm
and a more comprehensive
http://www.nihs.go.jp/dbcb/Bio-Topic/protein.pdf
I have a photospectrometer at work, but usually for infrared spectrum..
there is a UV/visible light one as well, but is busted
both of them are for solid materials, rather than liquid samples..
anyone got a UV photospec that can do liquids?