Determination of an Anionic Fluorochemical Surfactant in a Semiconductor Etch Bath

Application Update 139 Determination of an Anionic Fluorochemical Surfactant (FC-95) in a Steel Bath INTRODUCTION In the chemical milling process, perfluorinated surfactants are used as wetting agents in acid etching solutions. Chemical milling is a method of processing metal parts…

Application Note 120 Determination of Calcium and Magnesium in Brine INTRODUCTION To prevent membrane poisoning, new membrane technology in chlor-alkali cells requires feed brine that is relatively free of alkaline earth metals. Membrane manufacturers recommend that saturated brines be purified…

Technical Note 44 The Determination of Trace Anions in Concentrated Phosphoric Acid INTRODUCTION EQUIPMENT The determination of trace anions in phosphoric acid is hampered by a large excess of phosphate ion. Chloride determination at 0.1 mg/L (ppm) in 85% (w/w)…

APPLICATION NOTE 131 Determination of transition metals at ppt levels in high-purity water and SC2 (D-clean) baths Authors Mark Laikhtman and Jeff Rohrer Thermo Fisher Scientific, Sunnyvale, CA Keywords Ion chromatography, IC, copper, zinc, absorbance, IonPac CS5A, iron, nickel, PAR,…