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ATMOSPHERIC PRESSURE CAPACITIVELY COUPLED PLASMA ATOMIZER FOR ATOMIC ABSORPTION AND EMISSION SPECTROSCOPY
ATMOSPHERIC PRESSURE CAPACITIVELY COUPLED PLASMA ATOMIZER FOR ATOMIC ABSORPTION AND EMISSION SPECTROSCOPY
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机译：大气压力电容耦合等离子体原子吸收和发射光谱
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摘要
AN ATMOSPHERIC PRESSURE CAPACITIVELYCOUPLED PLASMA ATOMIZER FOR ATOMICABSORPTION AND EMISSION SPECTROSCOPYABSTRACT OF THE DISCLOSUREA novel atmospheric pressure capactively coup-led radio frequency plasma discharge method andapparatus are disclosed. The apparatus is suitable foratomic absorption and emission analysis of small,discrete sample volumes (1-50µl). The plasma can beoperated at very low Radio Frequency (RF) input powers(30- 600 W) which allows for optimal conditions for atomresonance line absorption measurements. Sampleintroduction into the plasma is by an electricallyheated tantalum strip vaporizer. The vaporization anddissociation-atomization steps are separatelycontrolled. Analyte absorption takes place in theplasma discharge which is characterized by a longpathlength (10-50 cm) and low support gas flow rate (0.2to 6 L/m) both of which provide for a relatively longresidence time. The optimum RF power for Ag analysis isbetween 100 and 200 W and the optimum support gas flowrate is about 0.6 L/m. The device exhibits linearcalibration plots and provides sensitivities in therange of from 3.5-40 pg.
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机译：电容性大气压等离子体原子耦合器吸收和发射光谱披露摘要一种新颖的大气压主动地抵消了led射频等离子体放电方法及公开了一种装置。该设备适用于原子吸收和发射分析小，离散样品量（1-50µl）。血浆可以是在非常低的射频（RF）输入功率下运行（30- 600 W）可以为原子提供最佳条件共振线吸收测量。样品通过电引入等离子体加热的钽带蒸发器。汽化和离解雾化步骤是分开的受控。分析物吸收发生在等离子放电的特点是时间长光程（10-50 cm）和低辅助气体流速（0.2至6 L / m），两者都提供了相对较长的时间停留时间。 Ag分析的最佳RF功率为100至200 W之间的功率和最佳的支撑气流流量约为0.6 L / m。设备显示线性校准图，并在范围从3.5-40 pg。
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