Eggshell as calcium source for humans: mineral composition and microbiological analysis

Ciência Rural

Milani, Liana Inês Guidolin¹  Emanuelli, Tatiana¹  Milbradt, Bruna Gressler²  Callegaro, Maria da Graça Kolisnki¹  Silva, Jéssica Soares da¹  Flores, Érico Marlon de Moraes¹  Lunardi, Julianna Rodrigues¹  Müller, Aline Lima Hermes¹ 

[1] UFSM, Santa Maria, Brazil;Universidade Federal de Santa Maria, Santa Maria, Brazil

关键词: eggshells;    calcium;    minerals;    toxic metals;    sanitary qualityINTRODUÇÃO:O cálcio (Ca) é o mineral mais abundante no corpo humano;    sendo responsável por cerca de 1 a 2% do peso corporal (SILVA & COZZOLINO;    2007);   

DOI  :  10.1590/0103-8478cr20140532

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

This study aimed to evaluate the mineral composition of different kinds of eggshell, as well as the microbiological safety of samples submitted to different sanitization procedures. To obtain the eggshell powder, the shells were washed, sanitized, oven dried and grinded in a mill. White- and brown-colored eggshells from confined laying hens and eggshells from free-ranged laying hens from the central region of Rio Grande do Sul were compared for their mineral composition. Ca, the predominant mineral in eggshells, remained at similar concentrations in the different samples (approximately 365mg g-1). Eggshells from confined laying hens had higher Mg concentration and lower Sr concentration than the shells from free-ranged laying hens. No significant amounts of Fe, Cr, Mn, Mo, Ni, Se, Al, Cd or Pb were found in the samples. Additionally, both samples that were sanitized by immersion in hypochlorite and subsequently boiled in water as well as samples in which hypochlorite immersion was suppressed did not show coliform, staphylococcus or salmonella contamination. The results indicate that eggshell can be used in human nutrition since it is rich Ca source, shows no contamination by toxic metals and has good sanitary quality when properly processed

【 授权许可】

Unknown