Türk Beyaz Çayında Temel ve Toksik Elementlerin Yapraktan Deme Geçişi

Öz

Çay, makro, mikro, eser elementleri ve ağır metalleri içeren bir bitkidir. Çay bileşenlerinin insan sağlığına sayısız olumlu etkisi vardır. Özellikle beyaz çay, bazı bileşenlerin içeriğinin daha yüksek olması nedeniyle kanserle mücadelede en güçlü etkilere sahiptir. Ancak çay tüketimi yetişkinler ve çocuklar için gereken günlük mineral alımını aşmayacak şekilde ayarlanmalıdır. Bu çalışmada amaç, Türk beyaz çayının mineral bileşimini ve yapraklardan deme aktarılan element miktarlarını belirlemektir. Materyal olarak 2017 yılında üretilen Türk beyaz çayları kullanıldı. Çay yapraklarındaki ve çay infüzyonlarındaki elementler ve her numune için geçiş oranları belirlendi. Süzüntü örneklerindeki elementler (Al, B, Ba, Ca, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, P, Si ve Zn) Perkinelmer optima 5300 DV marka/model ICP OES cihaz ile analiz edildi. Yapraklardan en yüksek altı elementin infüzyonlara geçiş oranları sırasıyla %55.72 K, %5.65 Ca, %21.78 Mg, %16.90 Mn, %18.79 Al ve %23.91 Zn olarak belirlendi. Çay örneklerinde Cd, Co, Mo, Pb ve Va konsantrasyonları 0.05 mg L-1 olarak dedeksiyon limitinin altında bulunmuştur. Çayda ağır metallerin az olması veya hiç olmaması insan sağlığı açısından olumlu bir durumdur. Çay içeceği temel elementler açısından zengin olması nedeniyle sağlığa olumlu katkılara sahiptir.

Anahtar Kelimeler

• Makro elementler
• mikro elementler
• beyaz çay
• ağır metal
• Türk çayı

Essential and Toxic Element Transition from Leaf to Infusion in Turkish White Tea

Öz

Tea is a plant that contains macro, micro, trace elements and heavy metals. Tea components have countless positive effects on human health. Especially the white tea has the strongest effects in the fight against cancer due to the its higher content of some components. However, tea consumption should be adjusted so as not to exceed the daily mineral intake required for adults and children. The goals in this study are to determine the mineral composition of Turkish white tea and the elements amounts transferred from the leaves to the infusions. Turkish white teas produced in 2017 were used as materials. Elements in tea leaves and tea infusions were determined and transition rates were established for each sample. Elements (Al, B, Ba, Ca, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, P, Si and Zn) of filtrates were analyzed by the PerkinElmer Optima 5300 DV brand/model ICP OES device. Transition rates of the highest six elements from the leaves to the infusions were 55.72% K, 5.65% Ca, 21.78% Mg, 16.90% Mn, 18.79% Al and 23.91% Zn, respectively. Cd, Co, Mo, Pb and Va concentrations in tea samples were found below the detection limit of 0.05 mg L-1. The low or no heavy metals in tea is a positive situation for human health. Tea beverage has positive contributions to health by being rich in essential elements.

Anahtar Kelimeler

• Macro elements
• micro elements
• white tea
• heavy metal
• Turkish tea

Kaynakça

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