Evaluation of copper speciation and water quality factors that affect aqueous copper tasting response.

Abstract:

:This study determined taste thresholds for copper as its speciation was varied among free cupric ion, complexed cupric ion, and precipitated cupric particles. The impact of copper chemistry on taste is important as copper is added to many beverages and can be present in drinking water as a natural mineral or due to corrosion of copper plumbing. A one-of-five test was used to define thresholds with solutions containing 0.025-8 mg/l Cu (from copper sulfate) in distilled or mineralized water of varying pH. The mineralized water was designed to mimic the composition of a typical tap water. Group thresholds for copper in either distilled-deionized water or mineralized water were not significantly different and ranged from 0.4 to 0.8 mg/l Cu. A difference from control test was used to assess the impact of soluble and particulate copper on taste. Soluble copper species, including free cupric ion and complexed copper species, were readily tasted, while particulate copper was poorly tasted.

journal_name

Chem Senses

journal_title

Chemical senses

authors

Cuppett JD,Duncan SE,Dietrich AM

doi

10.1093/chemse/bjl010

subject

Has Abstract

pub_date

2006-09-01 00:00:00

pages

689-97

issue

7

eissn

0379-864X

issn

1464-3553

pii

bjl010

journal_volume

31

pub_type

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