I'm looking for a low molecular weight PEG ladder (400 Da - 2KDa) that I can use as a mixed retention time marker for HPLC analysis of various PEG compounds. Does anyone know if such a thing exists and, if so, where I can buy it?
Several chemical suppliers come to mind for PEG (PEO) standards. How about American Polymer Standards Corporation ? They sell lots of low Mw stds in the range you are looking for. Companies such as SIGMA will also have linear stds too, but far fewer in the low Mw range. I have used them often for GPC work.