Near‐infrared spectroscopic analysis of deterioration indices of soybeans for process control in oil milling plant

Abstract

The feaml~ility, of neaz-infrared (N]R) spcctroscopy was examined for analyzing quality criteria or deterioration indices of soybeans, such as the nitrogen solubility index (NSI), acid value, digestibility and percentage germination, as well as the contents of their major eoustituents (moisture, oil and total nitrogen). Because all the criteria are closely related to yield and quality of the final product, their rapid analysis is required for process control in the oil willing plant. NIR diffuse~reflectancc spectra were meatus_red on ground samples in an InfraAlyzer 500 (Bran+Luebbe Co., Norderstedt, Germany). As for the major constituents, the standard errors of prediction (SEP) were 0.34% (moisture), 02A% (oil) and 0.067% (total nitrc~ gen). These results show the ability of NIR for analyzing these parameters, as many r--~atrehers reported previously. As for the other quality criteria, the SEP values were 2.40 CNSI), 5.58 (digestibility), 0.29 (acid value) and 15.27 {ge~ mlnation percentage). Further, NIR analysis for some of these criteria of the extracted residue and defatted soybeaus was also eTamlned, and almost the same level of SEP values was obtained. Although it is still necessary to improve the accuracy, we concluded that the NIR method has the feasibility to measure quality criteria for the purpose of process control in the plant in place of the timecompnnlng chemical analyses that are conventionally used.

Nondestructive determination of fatty acid composition of husked sunflower (Helianthus annua L.) seeds by near‐infrared spectroscopy

“…The NIR method has been used for the analyses of major constituents in cereals and oilseeds (9)(10)(11)(12)(13)(14). Further, the NIR method has been developed to provide more detailed information than just major constituents because of its potential capacities.…”

Nondestructive Estimation of the Contents of the Functional Elements in Soybean by Near Infrared Reflectance Spectroscopy

“…Trials of a single seed analysis, and the data transfer were also carried out. The authors already reported the NIRS analysis of major constituents and the deterioration indices in the soybean (Sato et al 1994), and the fatty acid composition in soybean (Sato et al 2002). There were some trials to estimate amino acids composition in soy by NIRS method Pazdernik et al, 1997).…”

Olive Oil Analysis by Infrared and Raman Spectroscopy: Methodologies and Applications

“…As seen in the section Theory, these bands are the result of overtones (first and second) and combination of fundamental, largely hydrogenic vibrations that occur in the mid-infrared region. Various books and papers describe the assignment of the major near-infrared absorption bands (Bewig et al 1994;Cho & Iwamoto 1989;Fenton & Crisler 1959;Goddu 1957;Holman & Edmondson 1956;McClure 1994;Osborne & Fearn 1986;Panford& Deman 1990;Sato 1994;Sato, Kawano & Iwamoto 1991;Williams & Norris 1987). Table 8-1 display, respectively, the near-infrared spectrum (1100-2500 nm) obtained with a transmission cell and the assignment of the most noteworthy absorption bands of a virgin olive oil.…”