Flow‐injection in‐valve solid‐phase extraction spectrophotometric determination of uranium in geological samples

Abstract

Flow-injection analysis (FIA)

Cost-effective flow injection analysis systems for acetic acid

“…Another set was assembled using a peristaltic pump (Alitea, USA or Eyela, Japan), an injection valve (Alitea) or a homemade two-loop injection valve with a suction system using an aquarium pump [9,10], a mixing coil, and the laboratory-made detector with maximum value (peak height) holding for light transmission. Direct digital reading of the colorimeter was operated.…”

Editorial notes: Flow injection analysis in the Pacific Rims: Examples with various degrees of automation

“…Various degrees of automation can be implemented and targeted toward its unique advantages, namely high sample throughputs, small amounts of samples and reagents required, and relatively simple instrumentation, leading to economic savings. Other FI sample pretreatment means, such as in-valve minicolumn (ion-exchanger and SPE resins) have been proposed for geological and environmental samples from this region, such as for uranium [6,7] and lead [8]. A flow injection system with radiometric detection has been developed to have more advanced automation: sequential injection analysis (SIA) [5].…”

“…Beginning with spectrophotometric techniques, a number of detection systems have been incorporated with FIA, as summarized in Table 1, of which some were introduced from the Pacific Rims, such as radiometric [2], visual [3], and ion chromatography (IC) [4]. Some FIA applications for real samples have also been reported [3][4][5][6][7][8][9]. Flow injection dialysis (FID) incorporated with IC offers online sample pretreatment (online preseparation and predilution) for simultaneous determination of a group of ions [4].…”