'Breakthrough' method of material characterization. (Keeping up with Auxiliaries).PerkinElmer Instruments, Shelton, Conn., has introduced HyperDSC, a new thermal-analysis method touted as a breakthrough for material characterization A rather long and fancy word for analyzing a system or process and measuring its "characteristics." For example, a Web characterization would yield the number of current sites on the Web, types of sites, annual growth, etc. . This new method reportedly delivers much greater sensitivity than conventional differential scanning calorimetry Differential scanning calorimetry or DSC is a thermoanalytical technique in which the difference in the amount of heat required to increase the temperature of a sample and reference are measured as a function of temperature. (DSC (1) (Digital Signal Controller) A microcontroller and DSP combined on the same chip. It adds the interrupt-driven capabilities normally associated with a microcontroller to a DSP, which typically functions as a continuous process. See microcontroller and DSP. ). HyperDSC reportedly analyzes samples within seconds-up to 10 times faster than other techniques. DSC technology measures the amount of energy that is absorbed or released by a sample as it is heated, cooled, or held at a constant temperature. HyperDSC uses linear-controlled scanning rates of up to 5000 C/min when heating and cooling the sample, thereby providing the highest level of sensitivity for easier identification of weak transitions. HyperDSC mimics production processes, requires only a small sample size, and increases the rate of sample throughput. Unlike other DSC methods, HyperDSC reportedly eliminates or reduces changes such as re-crystallization, melting, and decomposition decomposition /de·com·po·si·tion/ (de-kom?pah-zish´un) the separation of compound bodies into their constituent principles. de·com·po·si·tion n. 1. , which may be induced induced /in·duced/ (in-dldbomacst´) 1. produced artificially. 2. produced by induction. induced, adj artificially caused to occur. induced induction. by slow thermal scanning. The HyperDSC method is possible only on PerkinElmer's Diamond DSC instrument because it allows measurements with controlled scanning rates from 0.01 to 500[degrees] C/min. The Diamond unit is a power-compensated DSC with two small, low-mass furnaces that heat and cool rapidly. It provides better resolution and higher sensitivity, enabling detection of transitions that are missed in conventional heat-flux systems, according to according to prep. 1. As stated or indicated by; on the authority of: according to historians. 2. In keeping with: according to instructions. 3. PerkinElmer. Tel: (800) 762-4000, www.perkinelmer.com |
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