SİYAH ÇAY ÜRETİM ATIKLARINDAN KONSANTRE ÇAY EKSTRAKTI ÜRETİMİNDE KREMA OLUŞUM KOŞULLARININ VE BİLEŞİMİNİN BELİRLENMESİ

Öz

Bu çalışmada, Türk siyah çayı işletme atıklardan konsantre çay ekstraktı üretimi gerçekleştirilmiş, üretim sırasında oluşan krema miktarı ve bileşimi ile son ürünün bazı özellikleri belirlenmiştir. Bu doğrultuda en uygun ekstraksiyon koşullarının belirlenmesi amacıyla üç farklı sıcaklık (75, 85 ve 95 ºC), 5 farklı süre (15, 30, 45, 69 ve 90 dakika) ve 2 farklı atık çay/su besleme oranında (1/15 ve 1/20) ekstraksiyonlar gerçekleştirilmiştir. Ekstraksiyon çalışmaları en uygun şartların 95 °C, 30 dakika ve 1/15 besleme oranı olduğunu göstermiş ve elde edilen ekstraktın suda çözünür kuru madde miktarı 1.8 °Bx, kafein miktarı 0.45 g/100 g ve bulanıklık 27.6 NTU olarak ölçülmüştür. Ön konsantre (15 °Bx) edilen ekstraktlarda 4 ˚C’de 12 saat sonunda en fazla miktarda (1.98 g/100 mL) çay kreması oluşumu gözlenmiş ve kremanın %15.88 kafein, %17.08 protein, %8.72 epigallokateşin, %5.89 epigallokateşin gallat, %5.38 kateşin gallat, %4.04 epikateşin gallat, %2.83 gallokateşin, %2.15 epikateşin ve %1.37 kateşinden oluştuğu görülmüştür.

Anahtar Kelimeler

• Siyah çay atığı
• Çay kreması
• Konsantrasyon
• Bulanıklık
• Kateşin

DETERMINATION OF CREAM FORMATION CONDITIONS AND ITS COMPOSITION DURING PRODUCTION OF CONCENTRATED TEA EXTRACT FROM BLACK TEA MANUFACTURING WASTES

Öz

In this study, concentrated tea extract was obtained from Turkish black tea manufacturing wastes, the amount and composition of cream formed during production and also some properties of the concentrated product were determined. Accordingly, in order to determine the best extraction conditions, the treatments were carried out at three different temperatures (75, 85 and 95 ºC), five different time (15, 30, 45, 69 and 90 minutes) and two different waste tea/water feeding ratios (1/15 and 1/20). Extraction experiments showed that the best conditions were 95 ° C for 30 minutes in 1/15 ratio and the water soluble dry matter content of the obtained extract was measured as 1.8 ° Bx, caffeine amount and turbidity value were 0.45 g/100 g and 27.6 NTU, respectively. The highest amount (1.98 g/100 mL) of tea cream formation was observed after 12 hours at 4 °C in the pre-concentrated (15°-Bx) extracts, the cream consisted of 15.88% caffeine, 17.08% protein, 8.72% epigallocatechin, 5.89% epigallocatechin gallate, 5.38% catechin gallate, 4.04% epicatechin gallate, 2.83% gallocatechin, 2.15% epicatechin and 1.37% catechin.

Anahtar Kelimeler

• Black tea waste
• Tea creaming
• Concentration
• Turbidity
• Catechin

Kaynakça

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