pathlength

pathlength

(path -length, pahth -) See optical pathlength.
References in periodicals archive ?
Square One accommodates 1cm pathlength plastic or quartz cuvettes.
In NIR analyses, the value of the API is determined by a reference method with its errors involved; the matrix is strongly absorbing, being 90+% of the spectrum; and the sample is strongly scattering, thus the pathlength is far from consistent, or known.
Pathlength was 1cm and 5cm for 0.15-1.0 ppm and for 0.01 to 0.25ppm phosphorus, respectively.
Preprocessing corrections targeting pathlength, multiplicative scatter correction (Isaksson & NEBS 1988), and targeting derivatives, Savitzky-Golay (Savitzky & Golay 1964), algorithm methods were used.
The pathlength can be altered by simply changing windows--options range from 25 to 1000 pm.
where the differential pathlength factor (DPF) takes into account the extended pathlength due to scattering and G represents the losses due to scattering.
Data were collected in the 200-260 nm wavelength range using a quartz cuvette with a 1 cm pathlength, with a data pitch of 1 nm, a band width of 1 nm, and a scanning speed of 50 nm/min.
Beer-Lambert's law, A = [sigma]cl, relates spectral absorbance, A, to AuNP concentration, c, and optical pathlength, I, using a material- and wavelength-specific absorbance coefficient, [sigma] [17, 36].
Bryne, "Long pathlength absorbance spectroscopy: trace analysis of Fe(II) using a 4.5 m liquid core waveguide," Analytica Chimica Acta, vol.
Standard Reference Material (SRM) 2082 is designed to validate the pathlength for reduced-pathlength spectrophotometers and cuvettes based on the absorbance values, and data are provided to correct for differences in the temperature of the measurements and spectral bandwidth of the spectrophotometer.
If the ambient gas density [[rho].sub.0] is known a priori, then the change in projected mass in the beam path can be converted to an equivalent pathlength [33], which represents the volume displacement of ambient gas by the plasma integrated over the beam area;