We use infrared absorption
spectroscopy and from the laser measurements, ethanol in the angels' share is determined and used as an indicator on the potential maturation losses of the cask.
"We were able to visualize the fine structure of the infrared absorption
of molecules," says Lukas Emmenegger, head of the Air Pollution / Environmental Technology lab.
Patented FluidScan technology collects light transmitted through one drop of a fluid sample and registers the infrared absorption
and Raman scattering, only the first excited
In the case of humic substances, infrared absorption
bands generally cannot be interpreted safely, so the recommendation for humic material is to use the comparative mode, comparing a spectrum against another (Primo et al., 2011).
UV-VIS, NIR, and MIR infrared absorption
measurements were used to verify the presence of aromatic structures in these samples.
spectra in the midinfrared (4000-400[cm.sup.-1], 2 [cm.sup.-1] resolution) were measured by a Thermo Nicolet Nexus iN10 Fourier-transform infrared (FTIR) spectrometer, furnished with KBr and quartz beam splitters.
Salgado, "Validation of a stability indicating capillary electrophoresis method for the determination of darunavir in tablets and comparison with the of infrared absorption
spectroscopic method," World Journal of Pharmaceutical Sciences, vol.
Determination of molar absorptivity of the entire series of deconvoluted IR absorption bands of the [C.sub.76]-[D.sub.2] isomer at a given wave number [[epsilon].sub.[lambda]] was achieved through (1), previously applied for its main convoluted infrared absorption
bands for [C.sub.60] and [C.sub.70], as well as hydrogenated fullerenes [3,25-27,62], according to Lambert and Beer law using the absorbance Ax read at a given wave number.
To demonstrate molecular species detection in high concentration nitrate, we studied the infrared absorption
of the aqueous chemical system of NaN[O.sub.2] in the presence of NaN[O.sub.3].
Caption: Figure 3 (a) Infrared absorption
region of carbonyl group (1600-1750 [cm.sup.-1]) of LDPE films exposed to C[O.sub.2] laser radiation
The infrared absorption
observed near 1687 [cm.sup.-1] for the complex formed between 2-pyrrolidone and the [C.sub.60] nanoparticles at the lower concentrations (5 and 2 ([micro]L per mL) very likely exists at the higher concentrations of 2-pyrrolidone (200 and 100 [micro]L per mL); however, this infrared absorption
may be buried under the intense carbonyl absorption of the excess, noninteracting 2-pyrrolidone.