Applied Spectroscopy
SCOPUS (1970-2023)SCIE-ISI
0003-7028
1943-3530
Mỹ
Cơ quản chủ quản: SAGE Publications Inc.
Lĩnh vực:
InstrumentationSpectroscopy
Các bài báo tiêu biểu
Standard Normal Variate Transformation and De-Trending of Near-Infrared Diffuse Reflectance Spectra Particle size, scatter, and multi-collinearity are long-standing problems encountered in diffuse reflectance spectrometry. Multiplicative combinations of these effects are the major factor inhibiting the interpretation of near-infrared diffuse reflectance spectra. Sample particle size accounts for the majority of the variance, while variance due to chemical composition is small. Procedure... ...
Tập 43 Số 5 - Trang 772-777 - 1989
Generalized Two-Dimensional Correlation Method Applicable to Infrared, Raman, and other Types of Spectroscopy A two-dimensional (2D) correlation method generally applicable to various types of spectroscopy, including IR and Raman spectroscopy, is introduced. In the proposed 2D correlation scheme, an external perturbation is applied to a system while being monitored by an electromagnetic probe. With the application of a correlation analysis to spectral intensity fluctuations induced by the perturb... ...
Tập 47 Số 9 - Trang 1329-1336 - 1993
Linearization and Scatter-Correction for Near-Infrared Reflectance Spectra of Meat This paper is concerned with the quantitative analysis of multicomponent mixtures by diffuse reflectance spectroscopy. Near-infrared reflectance (NIRR) measurements are related to chemical composition but in a nonlinear way, and light scatter distorts the data. Various response linearizations of reflectance (R) are compared ( R with Saunderson correction for internal reflectance, log 1/ R... ...
Tập 39 Số 3 - Trang 491-500 - 1985
Interval Partial Least-Squares Regression (iPLS): A Comparative Chemometric Study with an Example from Near-Infrared Spectroscopy A new graphically oriented local modeling procedure called interval partial least-squares ( iPLS) is presented for use on spectral data. The iPLS method is compared to full-spectrum partial least-squares and the variable selection methods principal variables (PV), forward stepwise selection (FSS), and recursively weighted regression (RWR). The methods are tested on a near-infrared (NIR) s... ...
Tập 54 Số 3 - Trang 413-419 - 2000
Fluorescence Intensity Calibration Using the Raman Scatter Peak of Water Fluorescence data of replicate samples obtained from different fluorescence spectrometers or by the same spectrometer but with different instrument settings can have great intensity differences. In order to compare such data an intensity calibration must be applied. Here we explain a simple calibration method for fluorescence intensity using only the integrated area of a water Raman peak.... ...
Tập 63 Số 8 - Trang 936-940 - 2009
New Procedure for Quantitative Elemental Analysis by Laser-Induced Plasma Spectroscopy A new procedure, based on the laser-induced plasma spectroscopy (LIPS) technique, is proposed for calibration-free quantitative elemental analysis of materials. The method here presented, based on an algorithm developed and patented by IFAM-CNR, allows the matrix effects to be overcome, yielding precise and accurate quantitative results on elemental composition of materials without use of... ...
Tập 53 Số 8 - Trang 960-964 - 1999
Infrared Intensities of Liquids XX: The Intensity of the OH Stretching Band of Liquid Water Revisited, and the Best Current Values of the Optical Constants of H2O(l) at 25°C between 15,000 and 1 cm−1 The previously reported nonreproducibility of the intensity of the OH stretching band of liquid water has been explored. It was found that it can be eliminated in measurements with the Circle® multiple ATR cell by ensuring that the ATR rod is coaxial with the glass liquid holder. It was also found that normal laboratory temperature variations of a few degrees change the intensity by ⩽∼1% ... ...
Tập 50 Số 8 - Trang 1047-1057 - 1996
A Review of the Theory and Application of Coherent Anti-Stokes Raman Spectroscopy (CARS) Coherent anti-Stokes Raman spectroscopy (CARS) is a relatively new kind of Raman spectroscopy which is based on a nonlinear conversion of two laser beams into a coherent, laser-like Raman beam of high intensity in the anti-Stokes region. The emission is often many orders of magnitude greater than normal Raman scattering and, because of the coherent and anti-Stokes character of radiation, ... ...
Tập 31 Số 4 - Trang 253-271 - 1977
Portable Spectroscopy Until very recently, handheld spectrometers were the domain of major analytical and security instrument companies, with turnkey analyzers using spectroscopic techniques from X-ray fluorescence (XRF) for elemental analysis (metals), to Raman, mid-infrared, and near-infrared (NIR) for molecular analysis (mostly organics). However, the past few years have seen rapid changes in this landscape... ...
Tập 72 Số 12 - Trang 1701-1751 - 2018