AN85: Determination of Trace Anions in (Isopropyl Alcohol) Organic Solvents

Instrument Type: IC

The determination of trace anionic contamination in processing solvents (N-methyl-2-pyrrolidone, isopropyl alcohol (IPA), and acetone) is important to the electronics industries to minimize corrosion. Here matrix elimination is used to retain and concentrate µg/L anionic contamination in a 5 mL IPA sample onto a concentrator column. IPA is flushed to waste (5 min) with purified deionized water (10 mL). Trace anions are eluted from the concentrator and separated on IonPac AS9-HC column using 8 mM carbonate, 1.5 mM NaOH eluent. AU163 updates AN85 with < 0.2 ug/L lower detection limits.