Saccharin decreases the tensile strength of electrolytic nickel deposits and can, with increasing concentrations, cause compressive stress. Determination of saccharin by ion chromatography is faster and has fewer interferences than classical titrimetric methods of analysis.

Alkanolamines are important in the chemical, pharmaceutical, and petroleum industries. Their analysis is also important in metal surface finishing and in wastewater effluents. Ion chromatography (IC) works particularly well for separations of alkanolamines. This application update describes the use of the OmniPac PAX-500 column with Pulsed Amperometric Detection (PAD) to measure alkanolamines.

This Application Update describes a method for determining low ppm amounts of FC-95 in a steel bath (concentrated hydrofluoric, hydrochloric, and nitric acids with 200 g/L each of iron, chromium, and nickel) by ion chromatography. The method described in this Update is similar to that described in AN 119. The surfactant is removed from the acidic matrix and concentrated on an IonPac® NG1 column. The concentrated surfactant is then eluted from the IonPac NG1 column onto an OmniPac PAX-500 column set and detected by suppressed conductivity.

This AN describes the techniques, instrumentation, and method for determining low mg/L (ppm) amounts of the fluorochemical surfactant FC-93 in an etch bath (1 part hydrofluoric acid/6 parts ammonium fluoride) by IC. The surfactant is removed from the HF matrix by passing the sample through an IonPac NG1 column. The IonPac NG1 is a polymeric, reversed-phase column that quantitatively retains the surfactant but does not retain inorganic anions. The concentrated surfactant is then eluted from the IonPac NG1 onto an OmniPac PAX-500 column set and detected by chemically-suppressed conductivity.

The method described here shows a higher resolution separation of the organic acids and inorganic acids found in wine than previously reported. This approach is applied to the separation and detection of organic acids and inorganic anions in four red and white wine samples.