Related Experiment Video
Updated: Jun 28, 2026
20:00
Single Molecule Fluorescence Microscopy on Planar Supported Bilayers
Published on: October 31, 2015
Use of a filter in atomic-fluorescence spectroscopy
1General Electric Company Ltd. Central Research Laboratories Hirst Research Centre Wembley, England.
Talanta
|June 1, 1970
Summary
A new interference filter system significantly improves atomic-fluorescence spectroscopy detection limits for zinc and mercury. This advancement offers enhanced sensitivity for analyzing these elements in aqueous solutions.
Area of Science:
- Analytical Chemistry
- Spectroscopy
Background:
- Atomic-fluorescence spectroscopy (AFS) is a sensitive technique for elemental analysis.
- Traditional AFS detection systems often utilize monochromators or photomultipliers, which can limit detection sensitivity.
- Optimizing detection systems is crucial for achieving lower limits of detection (LOD) for trace elements.
Purpose of the Study:
- To develop and evaluate a novel interference filter-based detection system for atomic-fluorescence spectroscopy.
- To compare the performance of the interference filter system with traditional monochromator and solar-blind photomultiplier systems.
- To determine the limits of detection for zinc (Zn) and mercury (Hg) using the new system.
Main Methods:
- An interference filter-based detection system was designed for the 200.0-300.0 nm spectral region.
- The system was tested for atomic-fluorescence spectroscopy analysis of zinc and mercury in aqueous solutions.
- Performance was evaluated by comparing the limits of detection against systems using a monochromator and a solar-blind photomultiplier.
Main Results:
- Replacing a monochromator with the interference filter resulted in approximately 700-fold improvement in the limit of detection for zinc.
- A 10-fold improvement in the limit of detection for mercury was achieved with the interference filter system.
- The interference filter system demonstrated performance comparable to a solar-blind photomultiplier.
- Achieved LODs were 10(-5) ppm for zinc and 2.5 x 10(-4) ppm for mercury in aqueous solutions.
Conclusions:
- An interference filter is a highly effective component for enhancing atomic-fluorescence spectroscopy detection systems.
- The developed filter system offers superior sensitivity for analyzing zinc and mercury compared to monochromator-based systems.
- This technology provides improved limits of detection for trace elemental analysis in atomic-fluorescence flame spectroscopy.
Related Concept Videos
01:29Atomic Fluorescence Spectroscopy
Atomic fluorescence spectroscopy (AFS) is an analytical technique that involves the electronic transitions of atoms in a flame, furnace, or plasma being excited by electromagnetic (EM) radiation. When these atoms absorb energy, they become excited and subsequently release energy as they return to their original state. This emitted light, or "fluorescence," is observed at a right angle to the incident beam. Both absorption and emission processes transpire at distinct wavelengths, which are...
01:23Atomic Spectroscopy: Absorption, Emission, and Fluorescence
Atomic spectroscopy is a vital tool in elemental analysis, both qualitatively and quantitatively. It can be broadly divided into optical spectroscopy, mass spectroscopy, and X-ray spectroscopy methods. The optical spectroscopic methods are atomic absorption spectroscopy (AAS), atomic emission spectroscopy (AES), and atomic fluorescence spectroscopy (AFS). The first step in all three methods is atomization, where the solid, liquid, or solution-phase samples are converted into gas-phase atoms and...
01:22Atomic Emission Spectroscopy: Instrumentation
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers. Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
01:22Atomic Absorption Spectroscopy: Instrumentation
An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
The atomizer used in AAS can be either a flame atomizer or an...
01:30Atomic Emission Spectroscopy: Interference
In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
01:25Fluorescence and Phosphorescence: Instrumentation
Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.