New three phase double arc plasma for spectrochemical analysis of solid and powder samples

Mohamed, Moustafa M.; Ghatass, Z. F.; Shalaby, E. A.; Kotb, Mamdouh; El-Raey, M.

doi:10.1063/1.58311

Cited by 1 publication

(4 citation statements)

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“…The voltage between any two of the three phases was 380 V. This voltage was reduced with a three-phase way connected transformer (7.5 kW) to 95 V. Standard 32-A circuit breakers are placed in each leg. To drop the voltage across the plasma and to regulate the plasma current, 0-1.55 Ohm rheostats (consisting of two 16 A, 0-1.5 Ohm rheostats in series with other two in parallel) were connected in series between each transformer phase and its corresponding electrode [5,6].…”

Section: Experimental Workmentioning

confidence: 99%

“…The environmental samples were collected and digested as in previous work [5]. The samples were split into two parts; one part was analyzed by the present technique while the other was analyzed by atomic absorption spectroscopy (Perkin-Elmer Model 2380) as standard technique.…”

Section: Detection Limitsmentioning

confidence: 99%

“…This gives lower detection limits when compared with the pneumatic nebulizer [4]. Recently we have developed a three-phase plasma arc (TPPA) for atomic emission spectrochemical analysis [5]. To increase the analytical utility of the three-phase plasma system and to overcome problems related to the use of the pneumatic nebulizer in sample introduction, such as separation of the plasma discharge, due to large size of the aerosol drops, ultrasonic nebulizers have been used.…”

Section: Introductionmentioning

confidence: 99%

“…The sampling and digestion method were described in details in a previous paper [5]. An ultrasonic nebulizer (Fig.…”

Section: Sampling and Sample Introductionmentioning

confidence: 99%

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Three-phase plasma arc atomic-emission spectrometric analysis of environmental samples using an ultrasonic nebulizer

Ghatass

Roston

Mohamed

2003

Analytical and Bioanalytical Chemistry

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Combination of an ultrasonic nebulizer and plasma excitation sources for spectrochemical analysis offers desirable features of low detection limits, high sample throughput, wide dynamic range of operation, acceptable precision and accuracy, and simultaneous quantitative analytical capabilities. Moreover, the ultrasonic nebulizer does not require sample preconcentration. Recently we have developed a three-phase plasma arc (TPPA) for atomic emission spectrochemical analysis. In the present work, to increase the analytical utility of the three-phase plasma system, an ultrasonic nebulizer was used for sample introduction. The effects of the argon gas flow rate, current, excitation temperature have been studied. The analytical calibration curves are obtained for Ca, Cr, Fe, Mg and Mn, and detection limits have been calculated. The present technique is used to determine the concentration of the elements Ca, Cr, Fe, Mg and Mn in airborne samples.

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Section: Experimental Workmentioning

confidence: 99%

Section: Detection Limitsmentioning

confidence: 99%