Investigators can track origins, authenticity, and trace identity using the isotopic fingerprints (isotopic signatures) that are left behind in food, fiber, liquid, or stone. Isotope ratio mass spectrometry (IRMS) can help identify the isotopic signatures that provide information about a geographic region, botanical processes, soil, or fertilization processes. Capture the stories hidden in your samples with the Thermo Scientific portfolio of isotope ratio mass spectrometers. 

Isotopic fingerprints help uncover the history of your samples

Samples have unique chemical signatures, or fingerprints, that provide clues to their histories. Isotope ratio mass spectrometry (IRMS) can help visualize these fingerprints. IRMS traces carbon, nitrogen, sulfur, oxygen, and hydrogen isotopes by detecting their natural variations, revealing the origin and history of samples.

Food and beverage products have a fingerprint, a unique chemical signature that allows the product to be identified. To visualize this fingerprint, IRMS can be used, identifying the isotope fingerprint of the product. The isotope fingerprint in food and beverage products is region or process specific, which means that products can be differentiated based on geographical region (cheese, coffee, sugar, fish and animal feeding areas), botanical processes (beans, seeds, olive oil, vanilla), soil and fertilization processes (fruits and vegetables) and fraudulent practices (sugar addition to honey, watering of wines and spirits). These processes can be traced using carbon, nitrogen, sulfur, oxygen and hydrogen isotopes, with their variations indicating the origin and history of food and beverage products.

Protecting our environment from contamination is a global challenge, one that requires international focus and collaboration for our air, water and land resources. The natural and synthetic materials in our air, water and on our land have a fingerprint, a unique chemical signature that allows them to be identified and differentiated from one another. A unique chemical signature that allows this differentiation are the stable isotopes within the polluting material and we refer to this as the Isotope Fingerprint. To visualize this fingerprint, IRMS is used. The isotope fingerprint in natural sample materials is region or process specific, which means that samples can be differentiated based on geographical region (particulate matter in air), botanical origin (organic matter origin and movement) and mineralization processes (breakdown of material in nature). These processes can be routinely traced using carbon, nitrogen, sulfur, oxygen and hydrogen isotope fingerprints, providing scope for source identification and tracking changes in our environment on timescales from the present day and into the recent and deep past.

Tracing origin of pollution with the Isotope Hunter

Tracing pollution sources in air with isotope fingerprints

Forensic investigations examine sample materials to determine how similar or different they are, or to identify the origin of the material. Identifying the difference in a material or where it comes from can be achieved because materials have a unique chemical signature, like a fingerprint. To visualize this fingerprint, IRMS is used, measuring the stable isotopes of sample material that are essentially chemically identical. Unlike other types of inferential evidence in forensic investigations (e.g., bite marks, impression marks from tires or footwear, handwriting), isotope measurements are quantitative empirical evidence that are reproducible and easy to validate. The application of isotope fingerprints to forensic investigations has become more commonplace because there is a need for a rigorous scientific foundation underpinned by sound analytical techniques. Application areas include forensic investigations on human, criminal, environmental, ecological, food and archaeological materials.

Doping control with the Isotope Hunter

Investigating criminal forensic cases with the Isotope Hunter

Tracing human provenance using isotope fingerprints

As oil exploration is expensive, petroleum companies use multiple criteria for source identification, such as chemical and isotope fingerprinting, to meet decision on exploitation activities. Identification of sources can be achieved because petrochemical materials, just like other natural and synthetic materials, carry a unique chemical signature and we refer to this as the isotope fingerprint.

To visualize this fingerprint, IRMS is used. Application of isotope fingerprints in exploration and exploitation industry allows for differentiation of gas sources, migration, reservoir characterization, but also assessment of maturation and biodegradation processes. Isotope fingerprints of carbon, nitrogen, sulfur, oxygen and hydrogen are also used to address the influence of petrochemical exploration on environment. 

GC IsoLink II IRMS System

Gas chromatography IRMS

By combining the separation power of GC with IRMS, the Thermo Scientific GC IsoLink II IRMS System progresses the performance of compound analysis.

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LC IsoLink IRMS System

Liquid chromatography IRMS

Coupling HPLC and IRMS, the Thermo Scientific LC IsoLink IRMS System facilitates sensitive, accurate online determination of 13C/12C ratios.

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EA IsoLink IRMS System

Elemental analysis IRMS
 

The Thermo Scientific EA IsoLink IRMS System increases throughput, reduces cost per sample, and provides high-precision elemental and isotopic analysis.

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GasBench Plus System

GasBench IRMS
 

The Thermo Scientific GasBench Plus IRMS System provides a solution for high-precision, online isotope and molecular ratio determination of gaseous samples.

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Isotope hunter e-learning

Become an Isotope Hunter with this e-learning series

This e-learning module will introduce you to isotope fingerprints and how they are used to find answers to sample origin and authenticity. You will learn:

  • What are isotope fingerprints?
  • How can we detect an isotope fingerprint?
  • Where can isotope fingerprints be applied?
  • What are examples of applications of isotope fingerprints for food integrity, environmental forensics, criminal forensics, doping control, etc.

Start your journey to become an Isotope Hunter today ›

Isotope Fingerprints Compendium

Isotope fingerprints compendia

Are you performing origin analysis? In the compendia you will get an introduction to how isotope fingerprints are used for origin and authenticity for food integrity applications and forensic investigations.

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