Reference

A video imaging technique for assessing dermal exposure

A video imaging technique for assessing dermal exposure. II. Fluorescent tracer testing. Fenske, Richard A.; Wong, Sharon M.; Leffingwell, John T.; Spear, Robert C. (Cook Coll., Rutgers, State Univ., New Brunswick, NJ 08903, USA). Am. Ind. Hyg. Assoc. J., 47(12), 771-5 (English) 1986. CODEN: AIHAAP. ISSN: 0002-8894. DOCUMENT TYPE: Journal CA Section: 59 (Air Pollution and Industrial Hygiene) Section cross-reference(s): 4, 9, 80 UV irradn. and video imaging of the fluorescent 7-(diethylamino)-4-methylcoumarin (I) [91-44-1] to det. dermal exposure to malathion (II) [121-75-5] showed high correlations of I and II with spraying under controlled conditions and in field studies (r = 0.985 and 0.942, resp.); however, variability in deposition ratios required that field sampling be conducted to det. the ratio for a particular application. Penetration of I and II through cotton/polyester workshirt material showed a high correlation, whereas penetration of cotton/marked polyester coverall material was more variable . The ratio of II and I recovered from targets was consistently higher than the initial tank ratio because of differences in soly. and mixing. Field use of this methodol. is currently limited to research and monitoring studies in which exposure parameters can be characterized carefully.

Photochemical reactors

Photochemical reactors. (Toshiba Corp., Japan). Jpn. Kokai Tokkyo Koho JP 59004436 A2 11 Jan 1984 Showa, 4 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: B01J019-08. APPLICATION: JP 82-112061 29 Jun 1982. DOCUMENT TYPE: Patent CA Section: 52 (Electrochemical, Radiational, and Thermal Energy Technology) Section cross-reference(s): 38, 41, 49 Photochem. reactors consist of reactant(s), photochem. catalyst(s), and an energy absorber. The absorber is a transparent plate or film contg. a dye which has a higher absorption band than the catalyst(s), or an emission band near the absorption band of the catalyst(s). Thus, H2O was electrolyzed in a photochem. reactor to produce H. 1910-42-5 and 15158-62-0 are cas registry numbers of chemicals which are used as reagents here. The reactor contained 2-mm-thick acrylic resin plate contg. 7-diethylamino-4-Me coumarin [91-44-1] (dye), a Ru-dipyridyl complex (catalyst), methylviologen [1910-42-5] (catalyst), colloidal Pt, and RuO2. After 3 h exposure to sun of a 0.1 L reactant soln., the resp. H evolution was 1.1 and 0.7 mmol with and without the dye-contg. plate. .