DG-Tuning Solution Kit 500 LC-MS, 3 x 9mL

Contains 1ng/uL tetramethylammonium bromide, 0.1ng/uL tetrabutylammonium bromide, 0.1ng/uL tetrakis(decyl)ammonium bromide and 10ng/uL ultramark 1621 in methanol/acetonitrile/water/acetic acid (40:40:19.5:0.5 v/v)