B&M SAX ni inkingi ikomeye yo gukuramo anion hamwe na silika gel, ifite itsinda ryumunyu wa kane wa amonium. Ahanini ikoreshwa mugukuramo ibice bya anionic bidakomeye, nka acide karubike. Guhindura anion ikomeye irashobora gukoreshwa mugukuramo umuriro mubi mumazi nigisubizo kidafite amazi, cyane cyane mugukuramo aside idakomeye. Bikunze gukoreshwa mugukuraho anion zikomeye (acide organic, nucleotide, acide nucleic, imizi ya acide sulfonique, imyunyu ngugu, nibindi) murugero, hamwe na macromolecule desalination.