A microcomputer-based peak-width method of extended calibration for flow-injection atomic absorption spectrometry

Bysouth, Stephen R.; Tyson, Julian F.

doi:10.1016/s0003-2670(00)84496-7

Cited by 17 publications

(5 citation statements)

References 9 publications

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“…Another way of increasing the working range is evaluation of peak width instead of peak height. However, because of the logarithmic relationship between peak width and concentration the poor precision of this method makes it less suitable for most practical analytical applications (29,30).…”

Section: Introductionmentioning

confidence: 99%

Expansion of dynamic working range and correction for interferences in flame atomic absorption spectrometry using flow-injection gradient ratio calibration with a single standard

Sperling¹,

Fang²,

Welz³

1991

Anal. Chem.

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The potential usefulness of the reflective properties of microwave-induced plasma (MIP) as a gas chromatographic detector Is reported. The detector operation is based on the measurement of the change In reflected power arising from the Interaction of the analyte with an atmospheric pressure argon plasma sustained In the highly efficient TM010 resonant cavity. Microwave forward power and tangential gas flow are optimized for -pentane. The lowest microwave powers produced the best signal sensitivities. For the particular discharge tube employed, a maximum response Is obtained at approximately 1.6 L/mln. The nonlinear calibration curve obtained for n-pentane Is discussed, and Its conversion to a linearized calibration curve Is presented. Calculated detection limits for carbon and hydrogen lie In the upper nanograms of element per second range.

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Section: Introductionmentioning

confidence: 99%

Expansion of dynamic working range and correction for interferences in flame atomic absorption spectrometry using flow-injection gradient ratio calibration with a single standard

Sperling¹,

Fang²,

Welz³

1991

Anal. Chem.

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“…0, 0.0 and + 3.0 were obtained at 3, 50, 400 and 1000 mg 1-1 , respectively. It has also been shown that rather than construct a calibration curve by injection of a variety of solutions with different C m values and measuring LJt at the same value of C' for each peak, it is possible to obtain calibration data from a single peak by measuring LJt at a variety of C' values [15]. Larger errors were obtained with this latter method and it was suggested that this method might only be suitable as a rapid screening method enabling a dilution factor to be calculated to allow measurement by a more accurate calibration pro cedure.…”

Section: Time Based Methods 2 Peak Widthmentioning

confidence: 99%

Flow injection calibration techniques

Tyson

1988

Z. Anal. Chem.

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Summary. The role of calibration in the overall analytical procedure is discussed and the potential role of flow injection techniques are assessed. The factors affecting the dispersion obtained in a flow injection system are described and ex amples given of how control of the various factors can be exploited to produce manifolds for calibration purposes. Most of these examples concern atomic spectrometry methods for which there is considerable interest at present in developing extended range calibrations and flow injection versions of the standard additions method. Several examples of the latter are given.

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“…Analytical techniques with a limited working range for which the best precision was required could use a preliminary peak width measurement as an indication of the dilution factor necessary to bring the concentration of an off-range sample to that near the minimum in the precision vs concentration curve (40).…”

Section: The Futurementioning

confidence: 99%