Part II of this series described many of the miniature optical technologies that were developed as a result of the telecommunications boom, and Part III covered conventional small near-infrared (NIR) spectrometers. Here, in Part IV, we bring those themes together and see how the massive investment in telecommunications, microelectro- mechanical systems (MEMS), and micro-opto-electro-mechanical (MOEMS) is starting to impact NIR spectroscopy.

In Parts I-III of this series, columnist David W. Ball recounted the failings of classical mechanics, the quantum hypothesis, and the rise of a new theory called quantum mechanics. In this installment, he discusses the ideal systems whose wavefunctions can be determined exactly from the Schr?dinger equation.

Residue can be transferred from gloves to samples at detectable levels, especially in attenuated total reflectance infrared spectra. Some residues can be removed easily by washing and drying the gloves in a manner similar to washing and drying hands.


June 01, 2008

Featured products from the spectroscopy marketplace.


The continuing pace of technological advancements in scientific instruments has recently led to a wide range of commercially viable portable and handheld instruments, and the Raman spectroscopy market is no exception. While security applications have received much of the early attention in relation to handheld instruments, other applications are beginning to replace demand from the security markets.

Howard Mark and Jerome Workman, Jr. continue their discussion of the derivation of the principal component algorithm using elementary algebra.