DETERMINATION OF ANTHOCYANIN PIGMENTS IN SWEET POTATO LEAVES USING SPECIFIC CONTACT SENSORS

Abstract

In the last years the interest of the researchers regarding the natural anthocyanins increased. These pigments obtained from fruits and vegetable can be used as food dye, having attractive color and bioactive properties (with implications for human health). Selection of biological material with high content of anthocyanin is a priority. This is the reason because is important to identify quick and cheap methods used directly in the field during vegetation. This paper presents preliminary results on the determination of anthocyanin in sweet potato leaves (Hayanmi, KSP1, KSC1, Yulmi Juhwangmi) by two different methods. The anthocyanin content was determined using ACM-200-plus (Anthocyanin Content Meter) and in the laboratory using the extracts in 1% acidified methanol spectrophotometrically by the pH differential method. ACM-200-plus is an instrument designed for the rapid, non-destructive, determination of anthocyanin content in intact leaf samples.