Part XIX of this International Standard specifies a general
method of test for determining the water-soluble nitrates in
a Sample of Pigment by a spectrophotometric method using
salicylic acid.
Part XI I I specif ies a method for determining the
water-soluble nitrates in a Sample of Pigment using Nessler s
method.
NOTES
1 When this general method is applicable to a given Pigment, a
Cross-reference to it will be included in the International Standard
relating to that Pigment, with a note of any detailed modifications
which may be needed in view of the special properties of the
Pigment in question. Only when this general method is not
applicable to a particular Pigment will a special method for
determination of n itrates be specif ied.
2 It should be noted that the two methods may not necessarily
give the same result, and work is being carried out to compare the
two methods.
Diese ÖNORM beschreibt eine allgemeine Prüfmethode zur Bestimmung der wasserlöslichen Nitrate in einer Prigmentprobe mittels spectrophotometrischem Verfahren mit Salizylsäure.