triple detection

triple detection

[′trip·əl di‚tek·shən]
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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In the development of multi-component materials such as copolymers, triple detection is further improved upon by adding either a UV or PDA detector.
Triple Detection Standards comprise six sets of two standards each: one narrow and one broad.
For laboratories involved with characterization of natural and synthetic polymers, proteins or nanoparticulate materials, the company has published a 12-page booket comprising a series of technical articles to help practitioners of triple detection GPC/ SEC better understand and use the technology.
Combining the capabilities of traditional triple detection with new ultraviolet-viscometer and low-angle, light-scattering (LALS) options, the TDA measures concentration with a refractive-index (RI) or ultraviolet (UV) detector, or both.
Triple detection allows determination of absolute molecular weight, intrinsic viscosity, molecular size, and information on the conformation, structure, branching, and aggregation characteristics of the sample.
The changes of the average molar mass [M.sub.w], [M.sub.n], [M.sub.z], and molar mass distributions during multistep uniaxial drawing of poly(ethylene terephthalate) (PET) to achieve ultimate mechanical properties have been studied in detail by means of size exclusion chromatography (SEC) with triple detection: concentration, viscosimetry, and light scattering, using HFIP as solvent.
Triple Detection Standards (TDS) comprise six sets of two standards each, one narrow and one broad.
Triple detection is said to set the standard for GPC/SEC technology, and is said to be the preferred method for macromolecular characterization.
The compact and easy-to-use instrument can be configured as a high speed GPC with a triple detection system--including a viscometer, a light scattering and IR detector--or into a GPC + TREF system capable of performing both techniques and with a triple detector system also.