SciELO - Scientific Electronic Library Online

 
vol.30 número1Comparación de un reactor de biomasa suspendida y un reactor de biomasa adherida para la biodegradación de compuestos tóxicos presentes en aguas residuales de refinerías de petróleoLa huella de carbono de la observación de ballena jorobada (Megaptera novaeangliae) en las islas Marietas, Nayarit, México índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

Links relacionados

  • No hay artículos similaresSimilares en SciELO

Compartir


Revista internacional de contaminación ambiental

versión impresa ISSN 0188-4999

Resumen

REYES-SALAS, E. Octavio et al. Polarographic determination of metal pollutants for quality control technician grade phosphoric acid used in the production of food grade phosphate. Rev. Int. Contam. Ambient [online]. 2014, vol.30, n.1, pp.113-120. ISSN 0188-4999.

Phosphates are more versatile additives in food industry, among other applications are used as preservatives, pH buffers, antioxidants, emulsifiers, acidifying agents, disper-sants, etc. The phosphates are derived from phosphoric acid and this in turn is obtained in large quantities from a mineral known as fluorapatite; by the nature of the ore which gives rise to the phosphoric acid is important the analysis of various metal species that may be toxic to humans. Lead, cadmium and arsenic are present in the fluorapatite; in the same way may be present trace elements such as copper, zinc and iron if consumed in excess daily requirements can be harmful to health. In this paper we analyzed four samples of technical grade phosphoric acid (used for the manufacture of food grade phosphates) by differential pulse polarographic technique, employing HNO3/KNO3 0.1 mol L-1 with a three-electrode system. The detection limits found for Asm, Pbn, Cdn, Cun, Znn, and UVI (as (UO2)2-) were below the limits required by the international food additives rules and regulations. We identified and quantified Cdn and Znn in all samples analyzed, Cun in two of the samples and Asm and UVI in one sample each one.

Palabras llave : phosphoric acid; phosphates; electrochemical study; differential pulse polarography; quality control; food additives.

        · resumen en Español     · texto en Español     · Español ( pdf )

 

Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons