Biomaterial Database

Application of a new spectrophotometric method for zinc determination in beverages and condiments. 1988

M T Morales, and M T Montaña, and G Galán, and J L Gómez Ariza

Department of Food Chemistry, Toxicology and Applied Chemical Analysis, Faculty of Pharmacy, University of Seville, Spain.

A new spectrophotometric method has been applied to the determination of zinc in bottled mineral water (with and without gas), refreshments, vinegar, and table salt. The method introduces the 1-[di-(2-pyridyl)-methylidene]-5-(salicylidene)-thiocarbo hydrazone (DPST) as chromogenic reagent. This procedure is simple, rapid, reproducible and does not demand costly outfit and chemicals.

UI	MeSH Term	Description	Entries
D007202	Indicators and Reagents	Substances used for the detection, identification, analysis, etc. of chemical, biological, or pathologic processes or conditions. Indicators are substances that change in physical appearance, e.g., color, at or approaching the endpoint of a chemical titration, e.g., on the passage between acidity and alkalinity. Reagents are substances used for the detection or determination of another substance by chemical or microscopical means, especially analysis. Types of reagents are precipitants, solvents, oxidizers, reducers, fluxes, and colorimetric reagents. (From Grant & Hackh's Chemical Dictionary, 5th ed, p301, p499)	Indicator,Reagent,Reagents,Indicators,Reagents and Indicators
D003212	Condiments	Aromatic substances added to food before or after cooking to enhance its flavor. These are usually of vegetable origin.	Salad Dressing,Condiment,Dressing, Salad,Dressings, Salad,Salad Dressings
D001628	Beverages	Liquids that are suitable for drinking. (From Merriam Webster Collegiate Dictionary, 10th ed)	Beverage
D013053	Spectrophotometry	The art or process of comparing photometrically the relative intensities of the light in different parts of the spectrum.
D015032	Zinc	A metallic element of atomic number 30 and atomic weight 65.38. It is a necessary trace element in the diet, forming an essential part of many enzymes, and playing an important role in protein synthesis and in cell division. Zinc deficiency is associated with ANEMIA, short stature, HYPOGONADISM, impaired WOUND HEALING, and geophagia. It is known by the symbol Zn.