Ultra-trace cesium isotope ratio measurements from environmental samples by thermal ionization mass spectrometry (CAT#: STEM-ST-0224-LJX)

Introduction

135Cs/137Cs isotope ratios can provide the age, origin and history of environmental Cs contamination. Relatively high precision 135Cs/137Cs isotope ratio measurements from samples containing femtogram quantities of 137Cs are needed to accurately track contamination resuspension and redistribution following environmental 137Cs releases; however, mass spectrometric analyses of environmental samples are limited by the large quantities of ionization inhibitors and isobaric interferences which are present at relatively high concentrations in the environment.

Add to Cart Please Inquire

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:
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.

Other recommended products

High precision isotopic measurement of bromine by thermal ionization mass spectrometry (CAT#: STEM-ST-0233-LJX)
Determination of erbium in nuclear fuels by isotope dilution thermal ionization mass spectrometry and glow discharge mass spectrometry (CAT#: STEM-ST-0240-LJX)
Extraction and analysis of hydrosoluble chlorine and its stable isotopic composition in soil by thermal ionization mass spectrometry (CAT#: STEM-ST-0242-LJX)
Determination of Ultratrace Level 135Cs and 135Cs/137Cs Ratio in Small Volume Seawater by Chemical Separation and Thermal Ionization Mass Spectrometry (CAT#: STEM-ST-0231-LJX)
High precision isotopic measurement of chlorine by thermal ionization mass spectrometry (CAT#: STEM-ST-0195-LJX)
Analysis of molybdenum isotopes by thermal ionization mass spectrometry (CAT#: STEM-ST-0212-LJX)
Radium analysis from environmental samples by thermal ionization mass spectrometry (CAT#: STEM-ST-0205-LJX)
High-precision Sr–Nd–Pb isotopic analysis in geological samples using thermal ionization mass spectrometry (CAT#: STEM-ST-0209-LJX)