Disproportionation and thermal lens effects produced by Ar+ laser radiation on silver halide suspensions
✍ Scribed by M.A Rius Revert; M.C. García Alvarez-Coque; G. Ramis Ramos
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 645 KB
- Volume
- 292
- Category
- Article
- ISSN
- 0003-2670
No coin nor oath required. For personal study only.
✦ Synopsis
The thermal lens spectrometric ('IIS) signal increases when Ag+ is added to a halide solution or vice versa. The change in the TLS signal is due to the disproportionation and darkening of the surface of the silver halide particles produced by the Ar+ laser pump radiation. The change in the TLS signal depends on the nature of the ions in excess. The injection of an excess Ag+ into chloride and bromide solutions gives the fastest and largest responses, respectively. TL.S monitoring of titrations of chloride solutions with Ag+ is also possible. Absorbance is effectively discriminated from scattering in the slightly turbid silver halide suspensions.