Investigation of carbonate addition on essential element concentrations in various teas

Abstract

Daily consumption of various teas is a popular tradition in many countries especially in Turkey and although it shouldn’t be in tea, carbonate can be added to obtain more brew from teas especially in local coffeehouses. In this study, the effect of carbonate addition on the essential element concentrations of some black teas (black, earl grey and green tea), herbal teas (fennel, mint and sage tea) and fruit teas (apple, lemon and rosehip) is analysed by inductively coupled plasma optical emission spectrometer (ICP-OES), after the infusion process of tea brewing with carbonate. Afterwards, the total element contents of the tea grains in are determined by again ICP-OES prior to microwave digestion process. Considering the data obtained from the experiments, carbonate addition increased or decreased some elements with respect to the tea types. According to the results obtained after the microwave digestion method, although the major elements in all types of teas are found as Ca, K, P, Mg and Mn, which do not reach 2% brewing from the tea grains, carbonated infusion is not recommended due to its increasing effect on the concentration of the major elements contained in teas.

Keywords

• Black Tea
• Carbonate Effect
• Element
• Fruit Tea
• Herbal Tea

References

1. [1] Gorgulu TY, Ozdemir OD, Kipcak AS, Piskin MB, Derun EM. The effect of lemon on the essential element concentrations of herbal and fruit teas. Appl Biol Chem 2016;59:425–431. [CrossRef]
2. [2] Hamza A, Bahaffi SO, Abduljabbar TN, El-Shahawi MS. Trace determination and speciation of element in green tea. Results Chem 2021;3:100081. [CrossRef]
3. [3] Gorgulu TY, Kipcak AS, Ozdemir OD, Derun EM, Piskin S. Examination of the lemon effect on risk elements concentrations in herbal and fruit teas. Czech J Food Sci 2014;32:555. [CrossRef]
4. [4] Demir F, Kipcak AS, Ozdemir OD, Derun EM. Determination of essential and non-essential element concentrations and health risk assessment of some commercial fruit juices in Turkey. J Food Sci Technol 2020;57:4432–4442. [CrossRef]
5. [5] Whitney E, Rolfes SR. Understanding Nutrition. 11th ed. Belmont USA: Wadsworth Publishing, USA; 2007.
6. [6] Rolfes SR, Pinna K, Whitney E. Understanding Normal and Clinical Nutrition. 8th ed. Belmont USA: Wadsworth Publishing; 2008.
7. [7] Alnaimat AS, Barciela-Alonso MC, Herbello-Hermelo P, Dominguez-Gonzalez R, Bermejo-Barrera P. In vitro assessment of major and trace element bioaccessibility in tea samples. Talanta 2021;225:122083. [CrossRef]
8. [8] Shotyk W, Javed MB, Noernberg T. Trace elements in Labrador Tea (Rhododendron groenlandicum): How predominant sources to the plants impact the chemical composition of hot water extracts. Environ Res 2020;183:109272. [CrossRef]

9. [9] Pohl P, Szymczycha-Madeja A, Welna M. Direct ICP-OES multielement analysis of infused black and green teas and chemical fractionation of selected essential and non-essential elements prior to evaluation of their bioavailability and classification of teas by pattern recognition. Arab J Chem 2018;13:1955–1965. [CrossRef]
10. [10] Długaszek M, Kaszczuk M. Assessment of the nutritional value of various teas infusions in terms of the macro- and trace elements content. J Trace Elem Med Biol 2020;59:126428. [CrossRef]
11. [11] Voica C, Feher I, Iordache AM. Evaluation of metal concentration in herbal tea beverages by ICP-MS and chemometrics techniques. Quality Cont Bev Ind 2019;17:205–224. [CrossRef]
12. [12] Milani RF, Silvestre LK, Morgano MA, Cadore S. Investigation of twelve trace elements in herbal tea commercialized in Brazil. J Trace Elem Med Biol 2019;52:111–117. [CrossRef]
13. [13] Atasoy AD, Yesilnacar MI, Atasoy AF. Essential Element Contents of Turkish Black Tea. In: Grumezescu AM, Holban AM, editors. Non-alcoholic beverages. 6th ed. Cambridge: Woodhead Publishing; 2019. [CrossRef]
14. [14] Dalipi R, Borgese L, Tsuji K, Bontempi E, Depero LE. Elemental analysis of teas, herbs and their infusions by means of total reflection X-ray fluorescence. J Food Compos Anal 2018;67:128–134. [CrossRef]
15. [15] Erdemir Seven U. Contribution of tea (Camellia sinensis L.) to recommended daily intake of Mg, Mn, and Fe: An in vitro bioaccessibility assessment. J Food Compos Anal 2018;69:71–77. [CrossRef]
16. [16] Martín-Domingo MC, Pla A, Hernandez AF, Olmedo P, Navas-Acien A, Lozano-Paniagua D, et al. Determination of metalloid, metallic and mineral elements in herbal teas. Risk assessment for the consumers. J Food Compos Anal 2017;60:81–89. [CrossRef]
17. [17] Jeszka-Skowron M, Krawczyk M, Zgola-Grzeskowiak A. Determination of antioxidant activity, rutin, quercetin, phenolic acids and trace elements in tea infusions: Influence of citric acid addition on extraction of metals. J Food Compos Anal 2015;40:70–77. [CrossRef]
18. [18] Demir F, Yildirim M, Mermer NK, Derun EM. Determination of some element concentrations of first infant milk formula and health risk assessment. CBU Int Con Proc 2017;5:937–942.
19. [19] Derun EM. Determination of essential mineral concentrations in some Turkish teas and the effect of lemon addition. Food Sci Biotechnol 2014;23:671–675. [CrossRef]