Correct never judge a book by its cover!! Historically many vendors sample the best sample possible that may not be reflective of the next lot from the plant. Yes lot to lot variation exists and we have see historically of many plant managers going to jail in the last twenty years for cutting corners and selling product their own sales and marketing have no clue. Remember plant managers and production people get paid on a bonus every year and will do most anything as we have seen to get their Christmas bonus and depending on the circumstances decide the next year to retire or leave the company leaving the mess to be discovered and dealt with after the fact. Trust but verify . Save sample retains used in your study and test their quality compared to the C of A you receive. MP, DSC, TGA dynamic and isothermal , FTIR , UV spectra and even GCMS and HPLC for quality depending on your own end use application
Correct never judge a book by its cover!! Historically many vendors sample the best sample possible that may not be reflective of the next lot from the plant. Yes lot to lot variation exists and we have see historically of many plant managers going to jail in the last twenty years for cutting corners and selling product their own sales and marketing have no clue. Remember plant managers and production people get paid on a bonus every year and will do most anything as we have seen to get their Christmas bonus and depending on the circumstances decide the next year to retire or leave the company leaving the mess to be discovered and dealt with after the fact. Trust but verify . Save sample retains used in your study and test their quality compared to the C of A you receive. MP, DSC, TGA dynamic and isothermal , FTIR , UV spectra and even GCMS and HPLC for quality depending on your own end use application