Preparation of calcium chelated with essential amino acids using oyster shell powder as calcium source

ZHENG Jiemin; DU Bing

doi:10.13995/j.cnki.11-1802/ts.037537

Food and Fermentation Industries >

2024 , Vol. 50 >Issue 18: 273 - 278

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.037537

Preparation of calcium chelated with essential amino acids using oyster shell powder as calcium source

ZHENG Jiemin ,
DU Bing

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(College of Food Science, South China Agricultural University, Guangzhou 510642, China)

Received date: 2023-10-03

Revised date: 2023-11-08

Online published: 2024-10-14

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Abstract

Using waste oyster shells as raw materials, soluble calcium was prepared by acid hydrolysis, and then calcium chelated with compound essential amino acids was prepared by aqueous system synthesis, and the process was optimized by using one-way and orthogonal experiments with chelating rate as the evaluation index.Results showed that the optimal acid digestion condition was 0.1 g of oyster shell powder added with 2.5 mL of hydrochloric acid with a concentration of 1.25 mol/L, the acid digestion time was 22 min, the temperature was 70 ℃, and the yield of soluble calcium was 291.63 mg/g.The optimal process condition of calcium amino acid chelate was the volume ratio of compound amino acid solution to the acid solution was 5∶2, the reaction was carried out under the conditions of temperature of 75 ℃ and pH 8 for 45 min.The best chelating rate under this condition was 80.85%.This study provides a new research idea for the high-value utilisation of oyster shells and the production of essential amino acids.

Key words： oyster shell; essential amino acids; calcium amino acid chelate; chelation rate

Cite this article

ZHENG Jiemin , DU Bing . Preparation of calcium chelated with essential amino acids using oyster shell powder as calcium source[J]. Food and Fermentation Industries, 2024 , 50(18) : 273 -278 . DOI: 10.13995/j.cnki.11-1802/ts.037537

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