Related Experiment Video
Updated: Jun 28, 2026

Simultaneous Label-Free Autofluorescence Multi-Harmonic Microscopy
Published on: August 29, 2025
A simultaneous multielement non-dispersive atomic-fluorescence spectrometer using modulated sources and frequency
1Istituto di Chimica Analitica Strumentale del C.N.R.-Istituto di Chimica Analitica dell'Università Di Pisa, Via Risorgimento 35, 56100 Pisa, Italy.
Abstract:
Commercial radiofrequency-excited electrodeless discharge lamps can be run from a square-wave modulated power supply so as to give a low level of continuous emission when modulated in the frequency range 3-10 kHz. Use of a different modulation frequency and lock-in amplifier for each lamp allows multielement non-dispersive atomic-fluorescence spectrometry to be performed. Very low detection limits have been obtained for arsenic, selenium, tin and mercury. The use of low-cost electronic components in the system largely offsets the high cost of the individual excitation power supplies and tuned a.c. detectors.
Related Concept Videos
Atomic Fluorescence Spectroscopy
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
Atomic Emission Spectroscopy: Instrumentation
Atomic Spectroscopy: Absorption, Emission, and Fluorescence
Fluorescence and Phosphorescence: Instrumentation
Atomic Absorption Spectroscopy: Instrumentation
The atomizer used in AAS can be either a flame atomizer or an...

