Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
2299859
Reference Type
Technical Report
Title
Antifouling Paints Based on Organotin Compounds. Part I. Colorimetric Determination of Microgram Amounts of Organotin Compounds in Aqueous Solutions
Author(s)
Chromy, L; Uhacz, K
Year
1968
Report Number
NIOSH/00129716
Volume
51
Page Numbers
494-498
Abstract
A method for the direct quantitative determination of organotin compounds in aqueous solutions was developed. The compounds tested by this method were bis-(tri-n-butyltin)oxide (56359) (TBTO) and tri-n-butyltin-acetate (56360) (TBTA). Fifty milliliters (ml) of aqueous organotin solution was tracted twice with 5ml of carbon-tetrachloride (CCl4). The extracts were combined and were added drop by drop to 5ml of dithizone solution at a concentration of 0.02 milligrams per ml until a slight change of green color was noted. The sample was diluted to 10ml with CCl4 and the absorption of the sample was determined colorimetrically at a wavelength of 570 nanometers using a Number 7 filter. This method was able to determine 0.01mg of TBTA and TBTO. In a test solution of 1 part per million (ppm) TBTO, this method detected 0.93ppm. A 1ppm test solution of TBTA gave results of 0.95ppm detected. Concentrations of 50 and 200ppm TBTA were also satisfactorily determined; however, at 50 and 200ppm TBTO, a dispersion formed and the determination was not possible. The authors conclude that this method can be used to follow the leaching of organotin compounds from antifouling paint films.
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity