![]() A lamp is required for each element, although. An HCL takes advantage of the hollow cathode effect, which causes conduction at a lower voltage and with more current than a cold cathode. for atomic absorption spectrometers) and as a frequencytuner for light sources such as lasers. The frequency stability of the laser reached 1.1 × 10 11 at an averaging time of 1 s. A hollow-cathode lamp(HCL) is type of cold cathodelamp used in physicsand chemistryas a spectral linesource (e.g. The emission line selected must avoid wavelength overlaps, and have good intensity with low noise. Article information Abstract We demonstrate a diode laser system operating at 399 nm that is stabilized to the 6s 2 1 S 0 6s6p 1 P 1 electric dipole transition in ytterbium (Yb) atoms in a hollow-cathode lamp. ![]() AAS lamps utilize the hollow cathode effect to generate light at wavelengths for the element of interest. High-frequency modulation of the hollow-cathode lamp was applied to eliminate the influence of furnace emission on Zeeman-effect AAS signals. A hollow cathode lamp is used as a spectral line source for Atomic Absorption (AA) instruments. components of the radiation emitted by the furnace wall cause systematic errors in the ZAA signal and also contribute to the noise. The enhancement is much more pronounced in integrated absorbance than in peak absorbance. We develop a laser system with a wavelength of 461 nm and a power of 175 mW using a master oscillation poweramplier (MOPA) system and second-harmonic generation (SHG) via a KNbO3 crystal. When furnace emission is present, the ZAA:AAS ratio is increased. The ratio of the absorbances, ZAA:AAS, is equal in peak height and in integrated absorbance in the absence of furnace emission. The ratio of the signals measured with Zeeman-effect background-corrected atomic absorption spectrometry (ZAA) and atomic absorption spectrometry without Zeeman-effect background correction (AAS), depends on the contribution of the furnace emission intensity to the measured intensities. components, independent of the total amount of furnace emission that reaches the detector. The D2 lamp is chopped by a mechanical chopper driven by a stepper motor and a hollow cathode lamp is modulated electronically. About 8% of the radiation emitted by the wall of the graphite furnace consists of a.c. The hollow cathode lamp is a discharge lamp designed for use as a spectral line source with atomic absorption (AA) spectrometers.
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