This standard has been revised by ISO 787-19:2020
Abstract
This document specifies a spectrophotometric method. The principle of the method consists in that the nitrate present in the extract of the sample is used to nitrate salicylic acid in sulphuric acid medium. The nitro-compound formed is of an intense yellow colour in alkaline solution and the colour is measured spectrophotometrically at a wavelength of 410 nm. ISO 787/13 specifies a method using Nessler's reagent. The two methods may not necessarily give the same result; work is being carried out to compare the two methods.
-
Status: WithdrawnPublication date: 1974-05
-
Edition: 1Number of pages: 2
-
- ICS :
- 87.060.10 Pigments and extenders
Life cycle
-
Now
-
Revised by
PublishedISO 787-19:2020
Got a question?
Check out our FAQs
Customer care
+41 22 749 08 88
Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)