ʻO ke kānana Syring me ka membrane nylon i hana ʻia e Aijiren he hydrophilicity maikaʻi, ka waikawa a me ke kūpaʻa alkali, a me ke kūpaʻa oxidation. ʻAʻole kūpono wale ia no nā hoʻonā wai e loaʻa ana i nā waikawa a me nā alkalis, akā no nā mea hoʻoheheʻe organik e like me nā alcohols, hydrocarbons, lipids, phenols, ketones a me nā mea hoʻoheheʻe organik. Hiki ke hoʻohana ʻia no nā mea hoʻoheheʻe organik e like me ka waikawa ikaika, 70% ethanol, dichloromethane a pēlā aku. ʻO ke kūpaʻa wela kiʻekiʻe, ka ikaika maikaʻi, nā waiwai kemika paʻa.