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Atomic Absorption Spectroscopy: Instrumentation

Atomic 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...

Mass Analyzers: Common Types

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The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...

Mass Analyzers: Overview

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The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...

Atomic Absorption Spectroscopy: Lab

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For AAS measurements, samples must be introduced as clear solutions, often requiring extensive preliminary treatment to dissolve materials like soils, animal tissues, and minerals. Common methods for sample preparation include treatment with hot mineral acids, wet ashing, combustion in closed containers, high-temperature ashing, or fusion with reagents.
Solutions containing organic solvents, such as low-molecular-mass alcohols, esters, or ketones, enhance absorbances by increasing nebulizer...

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
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Atomic Emission Spectroscopy: Instrumentation

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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.

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Related Experiment Video

Updated: Jun 28, 2026

Automated 90Sr Separation and Preconcentration in a Lab-on-Valve System at Ppq Level

Automated ⁹⁰Sr Separation and Preconcentration in a Lab-on-Valve System at Ppq Level

Published on: June 6, 2018

Radio-controlled apparatus for automatic analytical measurements.

¹Institute of Analytical Chemistry, University of Messina, Italy.

|September 1, 1971

Summary

This study presents a novel apparatus for remote control and monitoring of chemical processes. It utilizes a radio receiver to detect frequency shifts from an oscillator, enabling real-time system adjustments and feedback.

Area of Science:

Instrumentation and Control Engineering
Chemical Process Monitoring
Remote Sensing Technology

Background:

Traditional chemical process monitoring often requires direct human intervention or complex wired systems.
The need for real-time, non-invasive monitoring and control in hazardous or inaccessible chemical environments is critical.
Existing remote control systems may lack integrated feedback mechanisms for adaptive process management.

Purpose of the Study:

To introduce an innovative apparatus for the remote operation and surveillance of chemical processes.
To demonstrate a method for real-time feedback control based on monitored physical parameters.
To enhance the safety and efficiency of chemical operations through advanced remote technology.

Main Methods:

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Automated, High-resolution Mobile Collection System for the Nitrogen Isotopic Analysis of NOx

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Measuring Cation Transport by Na,K- and H,K-ATPase in Xenopus Oocytes by Atomic Absorption Spectrophotometry: An Alternative to Radioisotope Assays

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Development of an apparatus featuring a radio receiver tuned to an oscillator's initial frequency.

Utilizing an oscillator that transduces physical system parameters into frequency signals.

Implementing a relay system activated by frequency changes, with integrated feedback to the monitored system.

Main Results:

The apparatus successfully enables remote control of chemical operations.
The radio receiver accurately detects frequency variations indicative of system changes.
The relay system provides effective feedback, allowing for dynamic process adjustments.

Conclusions:

The described apparatus offers a robust solution for remote chemical process control and monitoring.
Frequency transduction via oscillators and radio-receiver detection provides a reliable feedback loop.
This technology has the potential to significantly improve safety and automation in chemical engineering.