ANALISA KONSENTRASI POLIFENOL DALAM TEH HIJAU MENGGUNAKAN METODE ANALISIS SPEKTOFOTOMETRI VISIBEL (The Analysis of Polifenol Concentration in Green Tea Using Visible Spectrofotometri Analysis Method)

Abstract

Polyphenol in tea or often referred to as catechins are different substances with catechins contained in other plants. Catechins in tea do not adversely affect the digestion of food. Tea catechins are antimicrobial (bacteria and viruses), antioxidants, antiradiate, strengthen blood vessels, launch secretions and inhibit cancer cell growth. Catechins are a major group of green tea substances and most influential on all components of tea. In polyphenol removal using extraction method using 96% ethanol. The purpose of extraction is to withdraw the chemical components present in the material. This extraction is based on the principle of mass transfer of the component of the substance into the solvent, where the displacement begins at the interface layer and diffuses into the solvent. Spectrophotometer is a device used to measure relative energy if the energy is transmitted, reflected or emitted as a function of wavelength. In practice the concentration analysis of polyphenols using Visibel spectrophotometric instrument with 725nm wavelength. In making variable analysis of polyphenol concentration in green tea using tea with brand of bottle cap tea. It is known that bottled cap tea contains little concentration of polyphenols because bottle caps are included in green tea at low prices which contain little polyphenols. The result of polyphenol experiment of green tea samples obtained concentration 51.66, 53.50, 64.57, 73.80, 79.33, 83.02, 94.09 and 95.94 (ppm). Keywords : Pholypenol,Extraction,SpectrophotometryVisible