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- W2034336906 abstract "A new software-controlled time-based multisyringe flow injection system for mercury determination by cold-vapor atomic absorption spectrometry is proposed. Precise known volumes of sample, reducing agent (1.1% SnCl2 in 3% HCl) and carrier (3% HCl) are dispensed into a gas–liquid separation cell with a multisyringe burette coupled with one three-way solenoid valve. An argon flow delivers the reduced mercury to the spectrometer. The optimization of the system was carried out testing reaction coils and gas–liquid separators of different design as well as changing parameters, such as sample and reagents volumes, reagent concentrations and carrier gas flow rate, among others. The analytical curves were obtained within the range 50–5000 ng L−1. The detection limit (3σb/S) achieved is 5 ng L−1. The relative standard deviation (R.S.D.) was 1.4%, evaluated from 16 successive injections of 250 ng L−1 Hg standard solution. The injection and sample throughput per hour were 44 and 11, respectively. This technique was validated by means of solid and water reference materials with good agreement with the certified values and was successfully applied to fish samples." @default.
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- W2034336906 date "2006-07-01" @default.
- W2034336906 modified "2023-10-03" @default.
- W2034336906 title "Determination of mercury by multisyringe flow injection system with cold-vapor atomic absorption spectrometry" @default.
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- W2034336906 doi "https://doi.org/10.1016/j.aca.2006.04.078" @default.
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