Automatic sample handling and calibration methods for analysis by flame atomic absorption spectrometry using discontinuous flow analysis

Krieger, Brian L.; Kimber, Graham M.; Selby, Mark; Smith, Fraser O; Turak, Elvan E.; Petty, John D.; Peachey, Russell M.

doi:10.1039/ja9940900267

Cited by 7 publications

(2 citation statements)

References 10 publications

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“…In this way, ultrafast titrations (one titration every 25 s) were accomplished, yielding results comparable with classical titrations. The combination of discontinuous flow analysis with flame atomic absorption spectrometry was also proposed [143]: the abilities of the analyser to provide automatic calibration in approximately 30 s using a single solution, rapid automated standard additions and a sample bracketing procedure were emphasised. Another application of discontinuous flow analysis was reported in 5.5.…”

Section: The Discontinuous Flow Analysermentioning

confidence: 99%

Flow Analysers

Zagatto

2012

Flow Analysis With Spectrophotometric and Luminometric Detection

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Section: The Discontinuous Flow Analysermentioning

confidence: 99%

Flow Analysers

Zagatto

2012

Flow Analysis With Spectrophotometric and Luminometric Detection

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“…Since its inception in 1988 [12], DFA has attracted interest as a solution handling technique [13,14] and an accurate method for automated analysis [15][16][17]. A repeatability of less than 0.5 % rsd is readily achievable with DFA which more than satisfies the requirements of the photographic industry.…”

Section: Introductionmentioning

confidence: 99%

The Determination of Silver in Photographic Emulsionsby Discontinuous Flow Analysis

et al. 1998

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An investigation of the use of the flow-based procedure of discontinuous flow analysis (DFA) for the determination of silver in photographic emulsions is described. It is shown that a procedure used by the photographic industry which involves the complexation of a silver halide with the thiosulfate ion followed by titration with thioacetamide produces poor repeatability when applied in DFA. Evidence is presented to demonstrate that this is due to a slowing of the response of the silver sensor used to detect the end-point in the titration which is caused by the formation of a loosely bound layer of silver sulfide on the sensor surface. This surface layer has been identified using scanning electron microscopy and cyclic voltammetry. An alternative procedure is proposed for the determination using DFA which involves complexing the silver halide (bromide) with the cyanide ion followed by titration with sodium sulfide. The results from this method are within 2% compared with those obtained by AAS.

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