chemical signature

chemical signature

n.
A unique pattern produced by an analytical instrument, such as a spectrometer, indicating the presence of a particular molecule in a test sample.
Mentioned in ?
References in periodicals archive ?
The availability of an electronic nose with the ability to quantify and recognize the chemical signature of security threats at the part-per-trillion level is a significant breakthrough.
Finding its faint chemical signature required Hubble's powerful Cosmic Origins Spectrograph (COS), as carbon's fingerprints can be detected only in ultraviolet light, which cannot be observed from ground-based telescopes.
Decades ago, scientists found out that dabbing urine from an intact male mouse on the back of a neutered mouse gave the latter the chemical signature of an unaltered male.
The presence of important concentrations of picroilmenites in the samples indicates the presence of kimberlites or lamprophyres in the region and their distinctive chemical signature reveals diamond-conservation conditions.
Tests documented in the paper show the extraordinary sensitivity of this new generation of sensors that enable a user to identify the chemical signature of a substance within two minutes.
The chemical signature of the final adze places its origin in Hawaii.
GE's "Yxlon XES 3000(R)" system, which uses X-ray diffraction technology to identify the chemical signature of explosives, is the first non-computed tomography (CT) based technology to meet the TSA's certification standards for the detection of explosive devices.
The chemical signature of these grains is identical, and extremely rare - so rare, in fact, that scientists suspect both grains came from a single supernova.
The chemists differentiated between the presences of several substances to identify a chemical signature, or bio-marker, for the holly species Ilex.
Additional laboratory tests indicated that changes in conductivity closely matched variations in a chemical signature known as total acid number, a sign of oil quality.
But determining its origin had to wait more than 15 years, until Herschel used its sensitive infrared eyes to map the vertical and horizontal distribution of water's chemical signature.
Customers are furnished with a Certificate of Compliance for all applicable products and a detailed chemical signature analysis report is available on request.