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- W2037438320 abstract "The mutual separation and preconcentration of VV and VIV using chelating functional group immobilized silica gels (CISs) has been studied, based on inductively coupled plasma atomic emission spectrometric detection. Ethylenediamine-bonded (ED–CIS) and ethylenediaminetriacetate-bonded (ED3A-CIS) silica gels were used. A two-column system consisting of a first column of ED–CIS and a second column of ED3A-CIS was developed for on-line separation and preconcentration of VV and VIV. In the pH range 2.5–3.0, ED–CIS retains VV and separates it completely from VIV, whereas ED3A-CIS collects both VV and VIV. The second column can be used to preconcentrate VIV in the breakthrough solution from the first column. Separation is achieved with recoveries of 91–105%. The recovery of both ions is 98% or better. An enrichment factor of 40 is obtained, with which the detection limit of V with inductively coupled plasma atomic emission spectrometry is improved down to 60 pg ml–1. The method was applied successfully to V speciation in natural waters." @default.
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- W2037438320 date "1992-01-01" @default.
- W2037438320 modified "2023-09-23" @default.
- W2037438320 title "Mutual separation and preconcentration of vanadium(V) and vanadium(IV) in natural waters with chelating functional group immobilized silica gels followed by determination of vanadium by inductively coupled plasma atomic emission spectrometry" @default.
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- W2037438320 doi "https://doi.org/10.1039/an9921700013" @default.
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