Spectrophotometry near-infrared

Technician Velma Montoya, of the Actinide Analytical Chemistry Group at Los Alamos, works in a silica-free glove box to determine silicon content in plutonium samples using visible (near infrared) spectrophotometry. 

European Pharmacopoeia, 4th Edition (2002) Section 2.2.40 Near infrared spectrophotometry. 

R.M. Issa, K.M. El-Marsafy and M.M. Gohar, Application of the near infrared spectrophotometry as an analytical procedure for the determination of water in organic compounds and pharmaceutical products, An. Quim., 84, 312-315 (1988). 

FTNIR (Fourier transform near-infrared spectrophotometry), 663 FuUerene adducts, regioselective... 

RTECS commercial data, 621, 749 NIR spectrophotometry see Near-infrared spectrophotometry... 

Yamakoshi K, Yamakoshi Y. Pulse glucometry a new approach for noninvasive blood glucose measurements using instantaneous differential near-infrared spectrophotometry. Journal of Biomedical Optics 2006, 11, 054028. 

Whetsel, K. (1968) Near-infrared spectrophotometry. Appl. Spectrosc. Rev. 2,1-67. 

General Information Chapter (1119) Near-Infrared Spectrophotometry. 1998. Pharmacopeial Forum 24(4) 6463-6473. 

Hydrogen fluoride (HF) is determined quantitatively by near infrared spectrophotometry. The spectrum of HF is shown in Figure 6. It was obtained on a Beckman DK-2 spectrophotometer. A calibration... 

Determination of extent of formaldehyde-induced cross-linking in hard gelatin capsules by near-infrared spectrophotometry. Pharm. Res. 1997, 14 (8), 1046-1050. 59. 

Detection of formaldehyde-induced crosslinking in soft elastic gelatin capsules using near-infrared spectrophotometry. Pharm. Dev. Technol. 1998, 5 (2), 209-214. 60. 

Salsa, T. Pina, M.E. Teixeira-Dias, J.J.C. Crosslinking of gelatin in the reaction with formaldehyde an ftir spectroscopic study. Appl. Spectrosc. 1996, 50 (10), 1314—1318. Buice, R.G. Gold, T.B. Lodder, R.A. Digenis, G.A. Determination of moisture in intact gelatin capsules by near-infrared spectrophotometry. Pharm. Res. 1995,12 (1), 161-163. 

The United States Pharmacopoeia (U.S.P.) [5] in a chapter on validation of compendial methods, defines analytical performance parameters (accuracy, precision, specificity, limit of detection, limit of quantitation, linearity and range, ruggedness, and robustness) that are to be used for validating analytical methods. A proposed United States Pharmacopeia (U.S.P.) general chapter on near-infrared spectrophotometry [6] addresses the suitability of instrumentation for use in a particular method through a discussion of operational qualifications and performance verifications. 

K. D. Liem, J. C. Hopman, L. A. Kollee, and R. Oeseburg, Effects of Repeated Indomethacin Administration on Cerebral Oxygenation and Hemodynamics in Pre-Term Infants Combined Near-Infrared Spectrophotometry and Doppler Ultrasound Study, Eur. J. Pediat., 153(7), 504 (1994). 

Crowell, E.P. Determination of moisture in total particulate matter of cigarette smoke by near-infrared spectrophotometry 14th Tobacco Chemists Research Conference, Program Booklet and Abstracts, Vol. 14, Paper No. 30, 1960, p. 15 Crowell, E.P., WF. Kuhn, F.E. Resnik, and C.J. Varsel The determination of moisture in total particulate matter of cigarette smoke by near-infrared spectrophotometry Tob. Sci. 5 (1961) 54-57. 

It is becoming more and more desirable for the analytical chemist to move away from the laboratory and into the field via in-field instruments and remote, point of use, measurements. As a result, process analytical chemistry has imdeigone an offensive thmst in regard to problem solving capabiUty (77—79). In situ analysis enables the study of key process parameters for the purpose of definition and subsequent optimization. On-line analysis capabiUty has already been extended to gc, Ic, ms, and ftir techniques as well as to icp-emission spectroscopy, flow injection analysis, and near infrared spectrophotometry (80). 

M. Wolf, U. Wolf, J.H. Choi, V. Toronov, L.A. Paunescu, A. Michalos, E. Gratton, Fast cerebral functional signal in the 100-ms range detected in the visual cortex by frequency-domain near-infrared spectrophotometry, Psychophysiology 40, 521-528 (2003)... 

Goddu, R.F. Near infrared spectrophotometry. In Advances in Analytical Chemistry and Instrumentation Reilly, C.N., Ed. John Wiley and Sons, Inc. New York, 1960 Vol. 1. 

Different types of detectors have been developed and many are under development. These are based on distinctive physicochemical properties of plastics and employ different techniques such as x-ray, near-infrared spectrophotometry, fluorescence, and optical measurement of transparency and color. Automatic systems consisting of a platform for selection according to plastics topology, a number of identification and detection steps, and adequate checks on the efficiency of separation following detection have been developed. The Poly-Sort system described above is one such example. 

The moisture content of seeds has been determined (Hart et al., 1962) by near-infrared spectrophotometry of their methanol extracts. The absorbance of water at 1.93 fi was used. The standard deviation of the results from those obtained by titration with Karl Fischer reagent was +0.24%. The infrared method was more rapid and less exacting than the Karl Fischer method. 

Near-infrared spectrophotometry (1.9 fi band) has also been used to determine the moisture in particulate matter of cigarette smoke (Crowell et al, 1961). 

J.W. Hall, A. Pollard, Near-infrared Spectrophotometry a New Dimension in Clinical Chemistry , Clin. Chem., 38, 1623-1631 (1992). 

Slavin W (1963) Stray Light in Ultraviolet, Visible, and Near-infrared Spectrophotometry. Analytical Chemistry 35(4) 561-566. 

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