I am posting these reports on request of @godt240 .
I have received these samples from him about a month ago, marked just with numbers. Mass spectrometry confirm presence of 191 AA hGH with molecular weight 22.129 kDa and its dimer. No other contaminants were detected. Dimer was found in about 15% of total protein amount, however initially it could be lower. I had some issues with mass spec so the samples were waiting reconstituted in fridge for about two weeks. This could lead to increased levels of dimer. Quantitative assays show total protein content 8.2 and 9.3 mg respectively. According to customer, these samples come from batches 160517 and 120617.
What testing was done to confirm the sample was in fact a "protein".