Karakterisasi Natrium Alginat Dari Banten, Lampung Dan Yogyakarta

Abstract

ABSTRAK: Pada penelitian ini dilakukan studi mengenai ekstraksi alginat dari beberapa lokasi yaitu Banten, Lampung dan Yogyakarta. Hal ini bertujuan untuk menemukan Na-alginat terbaik dari beberapa rumput laut coklat yang ada. Parameter mutu alginate yaitu kadar air, kadar abu dan kadar abu tak larut asam. Hasil analisis didapatkan alginat dengan mutu terbaik berasal dari daerah Yogyakarta dikarenakan memiliki CAW paling tinggi dan impurities paling rendah pada pengujian secara fisik saat berbentuk rumput laut coklat kering dan memiliki rendemen paling banyak, viskositas paling tinggi, kadar air paling rendah, kadar abu dan abu tak larut asam paling rendah pada pengujian fisik dan kimia saat telah manjadi Na-alginat. ABSTRACT: A study was conducted on alginate extraction from several locations, namely Banten, Lampung and Yogyakarta. It aims to find the best Na-alginate from some of the existing brown seaweeds. Alginate quality parameters are moisture content, ash content and acid insoluble ash content. The analysis results obtained that the best quality alginate comes from the Yogyakarta area because it has the highest CAW and the lowest impurities in physical testing when it is in the form of dry brown seaweed and has the most yield, highest viscosity, lowest water content, ash and ash content. acid insoluble was lowest on physical and chemical tests when it was Na-alginate.

Physical and Chemical Characteristics of Alginate Extracted from Sargassum sp

“…Clean anhydrous weed (CAW) is the percentage of pure, dry seaweed weight to the initial weight. While the rest is water and other impurities such as other seaweed, sand, salt, and other materials attached to the seaweed [27]. Thus, the CAW content of the seaweed indicates its purity [28].…”

“…This means that Sargassum sp has a purity of about 69.32%; the remaining is water and other impurities in the form of seaweed, sand, salt, and other materials attached to the seaweed. [27] noted that CAW values of Sargassum sp. from Yogyakarta, Lampung, and Banten were 80.83±1.48%, 57.26±2.07 %, and 79.45±1.84 % correspondingly.…”

“…This is due to the high impurities and other seaweed mixed in Sargassum sp. Fransiska et al [27] reported that impurities of Sargassum sp obtained from Yogyakarta, Lampung, and Banten were 3,21±0,86%, 16,55±0,39%, dan 14,16±0,61%, respectively. The above result indicated that no brown seaweed met the quality standards of raw materials that SNI has set.…”

“…The above result indicated that no brown seaweed met the quality standards of raw materials that SNI has set. The impurities in seaweed can be generated by several factors, including environmental conditions of the waters [29], improper seaweed sorting process [27], and less than 45 days of harvest age of seaweed [30].…”

“…Alginate obtained in this study had 47.25 + 0.35 cps viscosity, which is in the range of standard value issued by the Committee on Codex Specifications [31], i.e., 10-5,000 cps., [27] noted that viscosity of alginate extracted from Sargassum sp collected from several places was in the range of 27.50 -30.83 cps. At the same time, the viscosity of commercial alginate [36] and alginate extracted [32] from Sargassum sp.…”