カラギナン類3種(精製カラギナン、加工ユーケマ藻類、ユーケマ藻末)の市販製品における硫酸基と酸不溶性物質の分析

概要

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The contents of sulfate and acid-insoluble matter in commercial products of three types of carrageenan, namely purified carrageenan (13 products, PC), semirefined carrageenan (6 products, SC), and powered red algae (3 products, PA), were determined. Sulfate content was calculated from the sulfur concentration determined by ICP atomic emission spectrometry. For digesting samples, a mixture of nitric acid and perchloric acid (5:1) was used instead of nitric acid used in the previous study. The sulfate contents were 18〜36%, 16〜18%, and 16〜27% for PC, SC, and PA, respectively. The ratios of quantity of the electric charges on metals (Na, K, Mg, and Ca) and sulfate were nearly 1 in most PC products and about 1.5〜2 in all SC products. However, some products in PC also gave values near 2. Therefore, a hypothesis that the ratio might be used as a measure for purification of the products could not be verified. The contents of acid-insoluble matter were less than 1%, 8〜13%, and 9〜14% for PC, SC, and PA, respectively. Consequently, it was considered that the specification of acid-insoluble matter should be established to discriminate the type of carrageenan.
日本食品化学学会の論文
1996-03-29