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• W4246078951 abstract "A software-controlled time-based multisyringe flow-injection system for total inorganic arsenic determination by hydride generation atomic fluorescence spectrometry (HGAFS) has been developed. By using a multisyringe burette coupled with one multiport selection valve, the time-based injection provides precise known volumes of sample, a reducing sodium tetrahydroborate solution and a pre-reducing solution which are dispensed into a gas–liquid separation cell. An argon flow delivers the arsine into the flame of an atomic fluorescence spectrometer. A hydrogen flow has been used to support the flame. Linear calibration graphs for arsenic concentrations between 0.25 and 12 μg l−1 were obtained. The detection limit of the proposed technique (3σb/S) was 0.07 μg l−1. A sample throughput of 36 samples/h (108 injections) has been achieved. The proposed technique has been validated by means of reference solid and water materials with good agreement with the certified values. This method was compared with those reported in previous sequential injection analysis (SIA) and flow-injection analysis (FIA) systems. The proposed method offers a number of advantages in front the usual AFS applications, which are mainly a higher sampling frequency and a significant reduction in reagent consumption." @default.
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• W4246078951 date "2002-03-01" @default.
• W4246078951 modified "2023-09-30" @default.
• W4246078951 title "Multisyringe flow-injection system for total inorganic arsenic determination by hydride generation-atomic fluorescence spectrometry" @default.
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• W4246078951 doi "https://doi.org/10.1016/s0003-2670(01)01612-9" @default.
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