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What you can't see can hurt you. Don't be left in the dark about FT-IR instrument perfor- mance. It's important to understand what information lies beyond the standard 4000 to 400 cm- ' spectral range. Be aware that many systems lose energy at 400 cm- ' and go non-linear beyond 4000 cm- '. Nicolet's the exception—our standard spectral range is from 7400 to 350 cm- ' which includes critical parts of the far and near-IR range. Without this extended range, important absorbances are unavailable for quantitative or qualitative analysis. Total spectral range is from 7400 to350cm-< with DTGS detector and Nicolet Ge coated KBr beamsplitter. The band at 5778 cm ~ ' quantifies the mapr component of the polymer sample. The absorbâmes at 385 and 358 cm - ' confirm the identity of the inorganic additive. CIRCLE 95 ON READER SERVICE CARD See us at Pittcon booth #4518, 4519, 4618. 6 A · ANALYTICAL CHEMISTRY, VOL. 64, NO. 1, JANUARY 1, 1992 For example, inorganics absorb below 400 cm- ' and the region above 4000 cm- ' is especially important for quantitative analysis of high concentrations. Nicolet is able to control instrument performance because the critical spectrometer components are manufactured in-house. We grind, polish and coat our own beamsplitters to provide the widest spectral range and spectral purity available. Be confident that the information you are given meets your needs. Why confine yourself to a system that has limited spectral range? To see the most complete FT-IR system available, contact Nicolet or circle the reader service number to receive more information. Nicolet INSTRUMENTS OF DISCOVERY 5225 Verona Rd. · Madison, WI537114495 TEL: 608/271-3333 · FAX: 608/273-5046 Attention to detail!
