Posted on October 3, 2018October 5, 2018 by Pulse AssentISO 21257:2018 Plastics. Polymer polyols for use in the production of polyurethane. Determination of the residual acrylonitrile and styrene monomer content by gas chromatography Link: ISO 21257:2018 Plastics. Polymer polyols for use in the production of polyurethane. Determination of the residual acrylonitrile and styrene monomer content by gas chromatography Source: BSI Standards Related Posts:PM: UK and South Africa will turbocharge growth togetherNew UK-France partnership to bring 'more energy…£80 million boost to help UK businesses tackle…£102 million government backing for nuclear and…Expert regional innovation hubs given £75 million…