Determination of some quality characteristics of peanut (Arachis hypogaea L.) using Near-Infrared Reflectance Spectroscopy (NIRS)

Abstract

The aim of this study was to determine protein, oil and moisture contents of peanut using Near Infrared Spectroscopy (NIRS). Foss NIRSystem XDS rapid content analyzer was used to determine XDS spectra of the samples which were taken from breeding lines and commercial cultivars. Reference values used to obtain calibration equations in NIRS were obtained by analyzing protein, oil and moisture contents of the samples. Protein, oil and moisture contents of the samples were analyzed by kjeldahl, soxhlet extraction and oven methods, respectively. Protein contents of peanuts were found to range between 19.90 and 30.1% whereas oil contents were found as 44.03-53.70%. Moisture contents of peanuts varied between 5.03 and 6.16%. Coefficient of determination (RSQ=R²) values between the results of classical analytical methods and NIRS were 0.925, 0.857 and 0.821 for protein, oil and moisture contents, respectively. The results of this study showed that NIRS can be used quick and accurate method to determine important quality characteristics of peanut.

Keywords

• Moisture ratio,NIRS,Protein content,Oil content,Peanut

Yerfıstığı (Arachis hypogaea L.)’nda bazı kalite özelliklerinin Yakın Kızılötesi Spektroskopi (NIRS) ile belirlenmesi

Abstract

Bu araştırma yerfıstığında yağ, protein ve nem oranının Yakın Kızılötesi Spektroskopi (NIRS) ile belirlenmesi amacıyla yürütülmüştür. Çalışmada yerfıstıklarından spektrumların alınmasında Foss NIRSystem XDS Rapid Content Analyzer near-infrared cihazı kullanılmıştır. Materyal olarak ıslah çalışmalarında kullanılan yağlık ve çerezlik yerfıstığı hatları ile ticari çeşitleri kullanılmıştır. NIRS’da kalibrasyon eşitliği üretmek için yerfıstığı numunelerinin referans protein değerleri kjeldahl protein tayin metodu ile, referans yağ değerleri soxhlet yağ tayin metodu ile, referans nem değerleri de etüv nem tayin metodu ile belirlenmiştir. Araştırma sonucunda, yerfıstığı numunelerinde referans analiz yöntemleri ile belirlenen protein oranları %19.90-30.10 arasında, yağ oranları %44.03-53.70 arasında, nem oranları ise %5.03-6.16 arasında değişim göstermiştir. Referans analiz yöntemleri ile NIRS okumaları arasında elde edilen kalibrasyon belirleme katsayısı (RSQ=R²) protein oranında 0.925, yağ oranında 0.857, nem oranında ise 0.821 olarak hesaplanmıştır. Elde edilen bulgular, NIRS yönteminin yerfıstığında bazı kalite parametrelerinin belirlenmesinde hızlı ve etkili bir yöntem olabileceğini göstermiştir.

Keywords

• Nem oranı,NIRS,Protein oranı,Yağ oranı,Yerfıstığı

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