Analytical determination of radioactive strontium and cesium by Thermal Ionization Mass Spectrometry (CAT#: STEM-ST-0246-LJX)

Introduction

The presence of anthropogenic isotopes in the environment is a byproduct of global fallout from nuclear weapons testing, nuclear power production, spent fuel rod reprocessing, medical isotope production, etc. Developing methods to detect and characterize the radionuclides produced by these activities is important for estimating potential dose to inhabitants via environmental monitoring and to aid modeling efforts of the nuclear fuel cycle. This service focuses on 89,90Sr and 135,137Cs and precisely determines them.

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Principle Applications Procedure Materials Notes Related Products

Principle

Thermal ionization mass spectrometry exploits the thermochemical reactions that occur in molecules in a sample when they are irradiated by a beam of high energy electrons. This reaction usually takes place at high temperatures, resulting in the formation of ions. The ionized species are accelerated in an electric field and then analyzed by mass spectrometry through the ion-focusing lens of a mass spectrometer. The mass spectrometer will separate and detect the ions according to their mass and charge.

Applications

For analyzing the distribution of molecules, atoms and molecular groups.
For studying the chemical structure of Earth's minerals and rocks.
For studying the structure and function of biomolecules.
For studying problems in physics.

Procedure

1. The sampling system sends the sample to be analyzed into the ion source;
2. The ion source ionizes the atoms and molecules in the sample into ions;
3. The mass analyzer separates ions according to the size of the mass-charge ratio;
4. The detector is used to measure and record the intensity of the ion current to obtain the mass spectrum.

Materials

• Sample Type:
Radioactive strontium and cesium

Notes

Before starting the machine, check whether the water (water cooler), electricity, gas (argon/nitrogen), temperature, humidity, and exhaust air of the instrument are normal.

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