Determination of water in ferrous lactate by near infrared reflectance spectroscopy with a fibre-optic probe.
Near infrared diffuse reflectance spectroscopy with a fibre-optic probe was used to determine the water content in ferrous lactate dihydrate. Spectra were recorded by immersing the probe in a beaker containing the ferrous lactate sample. Spectral data were processed by using two different multivariate calibration procedures, viz. stepwise multiple linear regression (SMLR) and partial least-squares regression (PLSR). The results provided by the two calibration procedures were similar and departed by less than 1.5% from the values obtained by Karl Fischer titration.
Blanco
M
M
Departamento de Química, Unidad de Quimica Analítica, Universidad Autónoma de Barcelona, Spain. IQAN1@CC.UAB.ES
Coello
J
J
Iturriaga
H
H
Maspoch
S
S
Rovira
E
E
D005296:Ferrous Compounds / Q000737:chemistry*; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007773:Lactates / Q000737:chemistry*; D016018:Least-Squares Analysis; D016014:Linear Models; D015999:Multivariate Analysis; D019265:Spectroscopy, Near-Infrared / Q000379:methods*; D013057:Spectrum Analysis; D014867:Water / Q000032:analysis*
D005296:Ferrous Compounds; D007773:Lactates; D014867:Water; C101012:ferrous lactate