Quality characteristics of Ohmic heated Aonla<i> </i><span style="mso-bidi-font-style:italic">(<i>Emblica</i><span style="font-size:14.0pt; color:black;mso-bidi-font-weight:bold" lang="EN-US"> <i>officinalis</i><span style="font-size:14.0pt; color:black;mso-bidi-font-weight:bold" lang="EN-US"> <span style="font-size:14.0pt;color:black;mso-bidi-font-weight:bold" lang="EN-US">Gaertn.) pulp </span></span></span></span>

Abstract

Present investigation deals with quality characteristics of aonla pulp subjected to ohmic heating at 11, 13, 15, 17 v/cm voltage gradients. The time and temperature were the process variables which were kept fixed on the basis of preliminary experiments. The product characteristics were evaluated for vitamin C, tannin content, titrable acidity, colour and microbial counts. Results indicated that all the quality parameters were influenced by treatment and KMS addition significantly. Per cent loss for all quality parameter was found to be least in aonla pulp ohmically treated at 17V/cm voltage gradient followed by 15, 13 and 11V/cm while the losses were maximum in conventionally prepared aonla pulp. Ohmically heated aonla pulp at 90°C for 1 minute was observed to be sufficient for safe storage of aonla pulp with little quality losses. In terms of quality, ohmically treated aonla pulp was found to be superior than conventionally prepared one. The quality losses in terms of vitamin C, tannin, titrable acidity and colour lightness were positively correlated to each other. Within the experimental range investigated in this study, aonla pulp ohmically heated at 17V/cm voltage gradients was found to be best in terms of all the quality parameters.