Atomic Absorption Spectrometric Determination of Cadmium and Lead in Human and Artificial Teeth by Direct Atomization Technique

Nakamura, Toshihiro; Kusata, Tomofumi; Matsumoto, Hiroshi; Sato, Jun

doi:10.1006/abio.1995.1223

Cited by 20 publications

(16 citation statements)

References 19 publications

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“…Therefore, many authors [29][30][31][32] reported that when solid or slurry samples are analyzed by ETAAS, the establishment of optimal condition concerning particle diameter is essential to achieve the best reproducibility. In the studies of Nakamura et al smaller particle diameter of tooth sample [33] silicate rocks [34], and quartz [35] demonstrated the best reproducibility. Usually accuracy and precision of measurement in slurry can be affected either by inadequate homogeneity or poor sample representivity, and/or incomplete recovery of analyte from the matrix during atomization process.…”

Section: Particle Diametermentioning

confidence: 94%

Determination of trace lead impurities in pure copper slurry samples by electrothermal atomic absorption spectrometry with molybdenum tube atomizer

et al. 2000

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Abstract.A method for direct atomization of slurry sample by electrothermal atomic absorption spectrometry (SS-ETAAS) has been developed for the determination of trace lead impurities in commercially available pure copper using laboratory-made molybdenum tube atomizer. Suitable charring temperature was set and matrix element interference was checked. Lead standard solution in the glycerol-water medium as calibration medium and ultrasonic agitation method of the suspension of the sample powder were used. Typical results of this direct slurry method and wet digestion were close and precision varies over the range RSD 3.9 to 9.0 %. The recovery of Pb added was 98-102 %. Accuracy for certified copper sample agreed within 3 % range. Limits of detection were 34 fg Pb (3S/N), and characteristic mass 170 fg Pb. The method offers rapid calibration, simplified and fast analysis of lead in pure copper at lower cost.

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Section: Particle Diametermentioning

confidence: 94%

Determination of trace lead impurities in pure copper slurry samples by electrothermal atomic absorption spectrometry with molybdenum tube atomizer

et al. 2000

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“…Our laboratory has successfully applied the direct introduction/AAS method to a variety of inorganic materials, such as carbonate rocks [24], silicate rocks [25], quartz and rock crystals [26], zirconia [27], silicon nitride and silicon carbide [28], human and artificial teeth [29], and soils [30]. If the pyrolysis temperature is insufficient for the decomposition of an IED comprising 90% poly(styrenedivinylbenzene) copolymer functionalized with an iminodiacetic acid group and 10% polytetrafluoroethylene, extremely high background absorption caused by the evolution of smoke may be observed during the atomization step.…”

Section: Atomization Conditionsmentioning

confidence: 99%

Determination of Heavy Metals at Sub-ppb Levels in Water by Graphite Furnace Atomic Absorption Spectrometry Using a Direct Introduction Technique after Preconcentration with an Iminodiacetate Extraction Disk

Inui¹,

Kosuge²,

Ohbuchi³

et al. 2012

AJAC

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A direct analysis method combining an iminodiacetate extraction disk (IED) with graphite furnace atomic absorption spectrometry was developed for the determination of Co, Ni, Cu, Cd, Sn, Pb, and Bi at sub-ppb levels in water. A 100 mL water sample was adjusted to pH 5.6 with nitric acid and a 1 mol·L -1 ammonium acetate solution, and then passed through an IED (diameter, 47 mm; effective filtering diameter, 35 mm) at a flow rate of 80 -100 mL·min -1 to preconcentrate seven analytes. The IED was dried at 100˚C for 20 min in an electric oven, and 110 -145 small disks, each 2 mm in diameter, were punched out from the IED. A small disk was introduced into the graphite furnace and atomized according to a heating program. For Cd, Sn, Pb, and Bi measurements, Pd was used as a chemical modifier to enhance the absorbances. Calibration was performed using aqueous standard solutions. The detection limits, corresponding to three times the standard deviation (n = 5) of the blank values, were 0.092 μg·L -1 for Co, 0.12 μg·L -1 for Ni, 0.40 μg·Lfor Cu, 0.077 μg·L -1 for Cd, 0.92 μg·L -1 for Sn, 0.61 μg·L -1 for Pb, and 0.80 μg·L -1 for Bi with an enrichment factor of 140 using a 100-mL water sample. A spike test for the seven analytes in tap water, rainwater, river water, and mineral drinking water showed quantitative recoveries (93% -108%).

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“…6 Nakamura et al reported that the smaller particle diameter of slurry samples presented the better reproducibility. [16][17][18] The effect of five different particle sizes of Table 2. The significant signal changes were observed with the variation in particle size.…”

Section: Optimization Of Slurry Samplingmentioning

confidence: 99%

“…5 The ultrasonic slurry sampling is a convenient method of introducing solid samples into the graphite furnace in electrothermal atomic absorption spectrometry (ETAAS). [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] The simplified sample treatment reduces the risks of sample contamination and analyte losses that may occur if the sample is decomposed prior to the analysis. ETAAS with a metal tube atomizer, which is similar to graphite furnace atomic absorption spectrometry (GFAAS), is known to provide better sensitivity for most metal elements and better reproducibility at relatively low power and low cost.…”

Section: Introductionmentioning

confidence: 99%

Slurry Sampling Techniques for the Determination of Lead in Bangladeshi Fish Samples by Electrothermal Atomic Absorption Spectrometry with a Metal Tube Atomizer

Rahman¹,

Kaneco²,

Suzuki³

et al. 2005

Annali di Chimica

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Ultrasonic slurry sampling electrothermal atomic absorption spectrometry with a metal tube atomizer has been applied to the determination of lead in Bangladeshi fish samples. The slurry sampling conditions, such as slurry stabilizing agent, slurry concentration, pyrolysis temperature for the slurried fish samples, particle size and ultrasonic agitation time, were optimized for electrothermal atomic absorption spectrometry with the Mo tube atomizer. Thiourea was used as the chemical modifier for the interference of matrix elements. The detection limit was 53 fg (3S/N). The determined amount of lead in Bangladeshi fish samples was consistent with those measured in the dissolved acid-digested samples. The advantages of the proposed methods are easy calibration, simplicity, low cost and rapid analysis.

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Atomic Absorption Spectrometric Determination of Cadmium and Lead in Human and Artificial Teeth by Direct Atomization Technique

Cited by 20 publications

References 19 publications

Determination of trace lead impurities in pure copper slurry samples by electrothermal atomic absorption spectrometry with molybdenum tube atomizer

Determination of trace lead impurities in pure copper slurry samples by electrothermal atomic absorption spectrometry with molybdenum tube atomizer

Determination of Heavy Metals at Sub-ppb Levels in Water by Graphite Furnace Atomic Absorption Spectrometry Using a Direct Introduction Technique after Preconcentration with an Iminodiacetate Extraction Disk

Slurry Sampling Techniques for the Determination of Lead in Bangladeshi Fish Samples by Electrothermal Atomic Absorption Spectrometry with a Metal Tube Atomizer

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