Bond Elut NH2, 96 round-well plate, 1 mL, 25 mg, 1/pk. Bond Elut NH2 is a weaker anion exchanger than sorbents such as SAX and is therefore a better choice for retention of very strong anions. Similar to Bond Elut Diol and SI sorbents, Bond Elut NH2 is excellent for the separation of structural isomers.