Unique identification meaning

Solute identification means qualitative analysis. Various methods are used today to identify a separated substance on a thin-layer chromatographic plate. Of all chromatographic methods, thin-layer chromatography (TLC) provides a unique simultaneous separation of up to 70 samples on the same plate therefore the reproducibility of the experimental conditions is not an issue because the experimental conditions are the same for all samples. This, together with the advantage of separating compounds with very different polarity and the possibility of using different detection methods for the same spot or for adjacent spots on the same plate, is the power of TLC. 

But the question of the test item would not remain the only one. In such situations as described above the different studies would need different study plans, and would receive different study numbers and other means of identification as required by the GLP Principles ( A unique identification... 

Because the relationship between emission wavelength and atomic number is known, isolation of individual characteristic lines allows the unique identification of an element to be made and elemental concentrations can be estimated from characteristic line intensities. Thus this technique is a means of material characterization in terms of chemical composition. 

Equipment Identification. Developing an accurate equipment history depends on reliable means of identifying the equipment. This usually includes a department- and/or facility-assigned unique identification number as well as the manufacturer, vendor, model, and serial number. Identification numbers provided by asset management are often inadequate to allow tracking of interchangeable modules or important items with a value less than a given amount. Acquisition cost is a useful data element. 

The matrix includes minimal electronics in an interface that includes a unique identification tag for the location as well as microprocessor-controlled measurement circuitry. This equipment is left on the pipe, which means that the location identifies itself to the monitoring instrument to avoid confusion of data and measurement parameters. 

A major objective was to identify the most efficient means of establishing a unique identifier for transgenic plants, and to draft conclusions, recommendations and points to consider within the context of OECD s Product Database. In this context, the Workshop proposed several options for a unique identifier. (See the Report of the OECD Workshop on Unique Identification Systems for Transgenic Plants http //www.oecd.org/biotrack)... 

In LC-MS, specific ionisation conditions can be required for different types of species. This means that in LC-MS studies on extractable additives, it is necessary to use a range of experimental conditions to cover detection of all types of potential species. Depending on instrument type, it is also possible to isolate ions in complex matrices and obtain positive identifications by further unique fragmentation of these ions (by MS-MS or MSn). Quantitative methods based on this secondary ionisation can be employed. The mass accuracy of LC-MS detection systems continues to improve. Accurate mass measurement improves the certainty of identification. Advanced systems are typically offering 1-2 ppm (mass dependent) mass accuracy. 

CAS registry number An identifying numberi ng system for chemicals called the Chemical Abstract Service (CAS) with individual numbers assigned by the American Chemical Society. CAS numbers identify specific chemicals and are assigned sequentially. Such a number is a concise and unique means of material identification. 

C.A.S. Registration Number Chemical Abstracts Service. An assigned number used to identify a material. CAS numbers identify specific chemicals and are assigned sequentially the number is a concise, unique means of material identification. A product of more than one component will have a specific number for each component (i.e., the CAS for lethal nerve agent GA, or tabun, is 77-81-9 while the CAS for the liquid nerve agent GB, or sarin, is 107-44-8, and 50.642-23-4). 

In each of these situations, sensing the aroma, which, for the purposes of this book, we will consider to consist of a specific molecule or suite of molecules that is uniquely produced by its source, provides the means of identification and/or location of the source. In each of these examples the user would gain significant advantage if a very sensitive and specifically tuned electronic sensor, which could accurately and reliably identify the characteristic aroma for that application, were available. 

Any system of animal identification should provide an appropriate means for distiuguishiug one animal from all other animals housed iu the same room. Each animal s identification only needs to he unique iu the room in which it is housed it need not he unique to all studies ever conducted with that species iu the laboratory. 

The voltammograms are unique for each basal plane and are often used as a diagnostic tool for the identification of primary Pt-surface sites [2-6,54]. The structure-sensitivity of the voltammogram serves as a means to characterize the preferential orientation of a given sample [55]. The voltammogram for platinum nanoparticles obtained by different preparation procedures is shown in Figure 6.13. The difference in voltammetric behavior displays the influence of preparation procedures on the fraction of (100), (110) and (111) atomic sites on the surface of the nanoparticles. 

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