26,29 Foreseeable future modifications of this method could include changing the PVP with polyvinylpolypyrrolidone, that is a very crosslinked sort of PVP that is certainly insoluble and will be divided in subsequent treatment method techniques with phenol-based mostly answers. Alternatively, the PVP could possibly be removed by using ethanol precipitation https://www.pinterest.com/pin/993958580252568713/