Biomaterial Database

Substoichiometric determination of mercury using 1-(2-pyridylazo)-2-naphthol. 1983

K A Rao, and B Rangamannar

A substoichiometric radiochemical method for the determination of mercury has been developed using 1-(2-pyridylazo)-2-naphthol (PAN) as a chelating agent. The chelate was extracted at pH 9.5 ( Na2CO3NaHCO3 buffer) into chloroform. 15-65 micrograms of mercury was determined with an accuracy +/- 0.9%. Effects of many diverse metal ions have been studied and procedures were developed for the suppression of interference due to these ions.

UI	MeSH Term	Description	Entries
D007477	Ions	An atom or group of atoms that have a positive or negative electric charge due to a gain (negative charge) or loss (positive charge) of one or more electrons. Atoms with a positive charge are known as CATIONS; those with a negative charge are ANIONS.
D008628	Mercury	A silver metallic element that exists as a liquid at room temperature. It has the atomic symbol Hg (from hydrargyrum, liquid silver), atomic number 80, and atomic weight 200.59. Mercury is used in many industrial applications and its salts have been employed therapeutically as purgatives, antisyphilitics, disinfectants, and astringents. It can be absorbed through the skin and mucous membranes which leads to MERCURY POISONING. Because of its toxicity, the clinical use of mercury and mercurials is diminishing.
D008670	Metals	Electropositive chemical elements characterized by ductility, malleability, luster, and conductance of heat and electricity. They can replace the hydrogen of an acid and form bases with hydroxyl radicals. (Grant & Hackh's Chemical Dictionary, 5th ed)	Metal
D009284	Naphthols	Naphthalene derivatives carrying one or more hydroxyl (-OH) groups at any ring position. They are often used in dyes and pigments, as antioxidants for rubber, fats, and oils, as insecticides, in pharmaceuticals, and in numerous other applications.	Hydroxynaphthalene,Hydroxynaphthalenes,Naphthol
D011854	Radiochemistry	The study of the chemical and physical phenomena of radioactive substances.	Radiochemistries
D002614	Chelating Agents	Chemicals that bind to and remove ions from solutions. Many chelating agents function through the formation of COORDINATION COMPLEXES with METALS.	Chelating Agent,Chelator,Complexons,Metal Antagonists,Chelators,Metal Chelating Agents,Agent, Chelating,Agents, Chelating,Agents, Metal Chelating,Antagonists, Metal,Chelating Agents, Metal
D002725	Chloroform	A commonly used laboratory solvent. It was previously used as an anesthetic, but was banned from use in the U.S. due to its suspected carcinogenicity.	Trichloromethane