ComplianceOnline

Sodium fluoride for industrial use -- Determination of fluorine content -- Modified Willard-Winter method


Document Number: ISO 2833:1973
File Size: 444 kB
Language: English
Provider: ANSI
Shipping: Available for download - Link will be provided in My ComplianceOnline section

Price: $49.00
Product Details

The principle consists in separation of the fluorine from a test portion by distillation with sulphuric acid or perchloric acid. Titration with thorium nitrate solution using sodium alizarinsuphonate and methylene blue as indicators. Alternatively the thorium nitrate titration may be carried out using sodium alizarinsuphonate alone as indicator, the end-point being determined spectrophotometrically under carefully defined conditions. The absorbance at a wavelength of 525 nm shall reach the arbitrary value of 0.6. Has also been approved by the IUPAC.

Product Reviews

This product hasn't received any reviews yet. Be the first to review this product! Write review

Best Sellers
You Recently Viewed
    Loading
Loading...