Sensitive determination of manganese using flow injection and chemiluminescent detection

Abstract

The determination of Mn2+ in aqueous solution using a flow injection system and a chemiluminescent method of detection is reported. The Mn2+ ion is determined with high sensitivity and selectivity by exploiting the Mn2+ catalysis of the luminous oxidation of 7,7,8,8-tetracyanoquinodimethane by dissolved O2 in alkaline solution. This reaction is sensitized by Eosin Y, and further enhanced by means of didodecyldimethylammonium bromide bilayer vesicles. The limit of detection for this reagent scheme is 4.5 ppb. A reaction mechanism and energy level diagram for this system is also presented for the first time. The method is applied to the determination of Mn2+ in raw and processed water.

Analytical applications of flow injection with chemiluminescence detection—a review

“…Iron(II) in rainwater has been determined using peroxyoxalate CL (88), and iron(II)/ total iron have been measured in river water and seawater using brilliant sulphoflavine-hydrogen peroxide CL (89). A CL method based on the oxidation of 7,7,8,8tetracyanoquinodinodimethane has been used to measure manganese(II) in drinking water (105), and the reaction between lucigenin, hydrogen peroxide and sodium hydroxide has been applied to the determination of lead(II) in natural waters (112).…”

Determination of manganese‐ and manganese‐containing fungicides with lucigenin–Tween‐20‐enhanced chemiluminescence detection

“…These values are within the consensus range of 0.74 ± 0.06 nM and 0.35 ± 0.06 nM. Bowie et al also described a method for manganese determination in potable waters. A no‐chelating resin mini‐column was incorporated into the FIA system as the nature of the matrix and the enhanced Mn levels meant that the reaction was sensitive enough without in‐line pre‐concentration.…”

Flow injection analysis as a tool for enhancing oceanographic nutrient measurements—A review

“…This method has been widely used at sea where profiles were in good agreement with data measured by GF-AAS in a shore-based laboratory. The reaction was also exploited by Bowie et al [235] in order to determine manganese in potable waters. No chelating resin mini-column was incorporated into the FIA system since the nature of the matrix and the enhanced Mn levels meant the reaction was sensitive enough without inline preconcentration.…”

“…No chelating resin mini-column was incorporated into the FIA system since the nature of the matrix and the enhanced Mn levels meant the reaction was sensitive enough without inline preconcentration. Bowie et al [235] investigated the reaction mechanism in detail and the CL emission was sensitised using eosin Y and further enhanced by means of didodecyldimethylammonium bromide (DDAB) bilayer vesicles.…”