TY - JOUR
T1 - Determination of physico-chemical parameters for bitumens using near infrared spectroscopy
AU - Blanco, M.
AU - Maspoch, S.
AU - Villarroya, I.
AU - Peralta, X.
AU - González, J. M.
AU - Torres, J.
PY - 2001/4/25
Y1 - 2001/4/25
N2 - Bitumens are usually characterised by using time-consuming empirical or functional physico-chemical tests. This paper reports a method for the determination of various physico-chemical properties (viz. viscosity at 60 and 135°C, density at 15°C, softening point and Fraass breaking point) and the chemical composition (viz. n-heptane-insoluble asphaltenes, asphaltenes + insoluble polar resins (IPR), saturated hydrocarbons, aromatic hydrocarbons and resins) of bitumens using near infrared (NIR) spectroscopy in conjunction with partial least-squares regression (PLSR). The proposed method surpasses existing alternatives in expeditiousness; also, it allows the simultaneous determination of several parameters from a single spectrum and is amenable to implementation in the continuous mode. Its accuracy and precision are essentially identical with those of reference methods; the relative standard deviation ranges from 0.2% for density to 14% for the Fraass breaking point. © 2001 Elsevier Science B.V.
AB - Bitumens are usually characterised by using time-consuming empirical or functional physico-chemical tests. This paper reports a method for the determination of various physico-chemical properties (viz. viscosity at 60 and 135°C, density at 15°C, softening point and Fraass breaking point) and the chemical composition (viz. n-heptane-insoluble asphaltenes, asphaltenes + insoluble polar resins (IPR), saturated hydrocarbons, aromatic hydrocarbons and resins) of bitumens using near infrared (NIR) spectroscopy in conjunction with partial least-squares regression (PLSR). The proposed method surpasses existing alternatives in expeditiousness; also, it allows the simultaneous determination of several parameters from a single spectrum and is amenable to implementation in the continuous mode. Its accuracy and precision are essentially identical with those of reference methods; the relative standard deviation ranges from 0.2% for density to 14% for the Fraass breaking point. © 2001 Elsevier Science B.V.
KW - Bitumens
KW - Multivariate calibration
KW - NIR spectroscopy
KW - Physico-chemical parameters determination
U2 - 10.1016/S0003-2670(01)00811-X
DO - 10.1016/S0003-2670(01)00811-X
M3 - Article
SN - 0003-2670
VL - 434
SP - 133
EP - 141
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
IS - 1
ER -