Trakya Bölgesinde Üretilen Çeşitli Süt Ürünlerinin Nitrat ve Nitrit Düzeylerine Göre Kemometrik Yöntemlerle Sınıflandırılması
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Date
2009
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Gıda Teknolojisi Derneği
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Abstract
Bu araştırma ile Türkiye süt ürünleri üretiminde önemli bir yeri olan Trakya Bölgesinde iki üretim yılı süresince üretilen beyaz peynir (28 adet), kaşar (19 adet), eritme peyniri (1 adet), yoğurt (16 adet), çiğ süt (5 adet) ve pastörize-steril (7 adet) sütlerdeki nitrat ve nitrit miktarları tespit edilmiş ve bulunan sonuçlar kemometrik yöntemler (Temel Bileşenler [PCA] ve Kümeleme [HCA] Analizleri) yardımıyla yörelere göre sınıflandırılmıştır. Gıdalarda bulunan nitrat ve nitrit düzeyleri, çevresel kirliliğin önemli bir parametresi olarak kabul edilmektedir. Beyaz peynirlerin (% 11.11)’i nitrat, (% 51.85)’i nitrit, kaşarların (% 21.05)’i nitrat ve (%31.58)’i nitrit, yoğurtların (%18.75)’i nitrat ve (%6.25)’i nitrit ve süt örneklerinin de (%25)’i nitrat ve tamamının ise nitrit içermediği görülmüştür. Trakya Bölgesi orijinli süt ürünlerinin tamamına ilişkin birleştirilmiş temel bileşenler analizi (PCA) sonuçlarına göre, PC1’in %83,04 oranında ve PC2’nin de %16.96 oranında toplam varyansı açıkladığı gözlemlenmiştir. Kemometrik analizlerden Kümeleme (HCA) analizi sonuçları temelinde, süt ürünleri (beyaz peynir, kaşar, yoğurt ve süt) örnekleri orijinlerine göre üçer ana gruba ayrılmış ve sınıflanmıştır.
In this study the amounts of nitrate and nitrite in white cheese (n=28), kashar cheese (n=19), produced cheese (n=1), yoghurt (n=16), raw milk (n= 5) and pasteurized-sterilized milk (n=7) manufactured in Thrace region, which has an important region in production of milk products of Turkey, were determined. The results were used to classify the samples according to the geographical origin using chemometric methods, namely Principal Component Analysis (PCA) and Hierarchical Cluster Analysis (HCA). The levels of nitrates and nitrites in food are accepted as an important parameter of environmental pollution. It was observed that 11.11% of white cheese, 21.05% of kashar cheese, 18.75% of yoghurt and 25% of drinking milk samples did not contain nitrates. On the other hand, no significant amount of nitrites were found in 51.85%of white cheese, 31.58% of kashar cheese, 6.25% of yoghurt and all of the drinking milk samples. In addition, PCA results showed that the first principal component (PC1) and the second principal component (PC2) explained 83.04% and 16.96% of the total variance, respectively for the entire milk product samples originated from Thrace region. Based on the HCA results, the milk product samples were separated and classified into three main groups according to their geographical origins.
In this study the amounts of nitrate and nitrite in white cheese (n=28), kashar cheese (n=19), produced cheese (n=1), yoghurt (n=16), raw milk (n= 5) and pasteurized-sterilized milk (n=7) manufactured in Thrace region, which has an important region in production of milk products of Turkey, were determined. The results were used to classify the samples according to the geographical origin using chemometric methods, namely Principal Component Analysis (PCA) and Hierarchical Cluster Analysis (HCA). The levels of nitrates and nitrites in food are accepted as an important parameter of environmental pollution. It was observed that 11.11% of white cheese, 21.05% of kashar cheese, 18.75% of yoghurt and 25% of drinking milk samples did not contain nitrates. On the other hand, no significant amount of nitrites were found in 51.85%of white cheese, 31.58% of kashar cheese, 6.25% of yoghurt and all of the drinking milk samples. In addition, PCA results showed that the first principal component (PC1) and the second principal component (PC2) explained 83.04% and 16.96% of the total variance, respectively for the entire milk product samples originated from Thrace region. Based on the HCA results, the milk product samples were separated and classified into three main groups according to their geographical origins.
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Kemometri, Süt ürünleri, Coğrafi orijin
Turkish CoHE Thesis Center URL
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N/A
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Source
GIDA
Volume
34
Issue
6
Start Page
387
End Page
394