Nickel in tap water

Abstract
A patient''s suspicion and the possibility of internal provocation of Ni eczema encouraged measurement of Ni in tap water. Ni analyses of tap water from several sources in Copenhagen [Denmark] gave up to 490 .times. 10-6 g per 1 in the first 250 ml protions. Hot water gave higher values than cold water. After flushing for 5 min, low values were found. Considerable variation from time to time and from tap to tap was found. Drinking of only the 1st portion in the morning might have an influence on Ni hand enzyme.