Document X7L8aYpje4XnjxXGKNN790J14

precisely Deactivated Adsorbents Applied to the Separation of Chlorinated Hydrocarbons National Narine Fisheries Service, La Jolla, Calif. Southwest 'Fisheries center. AUTHOR: McClure, Vance E. C0104A4 FLD: 70, 59A, 86Q USGRDR7302 20 Nar 72 4p GRANT: NSF-OH-52 MONITOR: NOAA-72101012 prepared in cooperation with Scripps Institution of Oceanography, La Jolla, Calif. pub, in Jnl. of Chroaatography, v70 p16fl-170 1972. ABSTRACT: The eethod described in the report is applicable to adsorbents usually deactivated with water (Silica gel, eagnesia, alumina and Plorisil) and involves the eguilibration of the activated adsorbent with a solution of a strongly adsorbed naterial in an appropriate solvent. The degree of deactivation can be specified by the composition of the deactivating solution. Elution sust be performed only with solvents Incapable of renoving the strongly adsorbed species fron the adsorbent bed. (Author) DESCRIPTORS: (`Adsorption, `Chlorine organic cospounds), (`Pesticides, Adsorption), Adsorbents, Silicon dioxide, Alusinus oxides. Deactivation, Magnesiua oxides, DDT IDENTIFIERS: Bipheny1/chloro CON-72-11486 NTIS Prices: Reprint 39 HONS 054397 |^ Sampling of Glacial Snov for Pesticide analysis Massachusetts Univ., Amherst. Dept, of Cheaistry. (401) 721) gator pollution control research series AUTHOR: Stengle, T. R., Lichtenberg, J. J., Houston, c. s. CC054K2 ' FID: 6F, 57H, 68D USGRDR7301 Feb 71 25p PROJECT: EPA-HQO-16020-GAG MONITOR: EPA-WQO-16020-GAG-02/71 Prepared in cooperation vith the Veraont univ., Burlington. Community Medicine. Paper copy available fro* GPO SO.35 as EP1 16026-GAG-0271, Dept, ot ABSTRACT: Snov saaples were taken fro* the plateau glacier of Mt, Logan, Y, T,, Canada during an investigation intent on demonstrating the feasibility of taking such saaples fro* high altitude snowfields for pesticide analysis and developing sampling techniques devoid ot contamination. Saaples were also taken at a depth of 16 m to deteraine whether DDT concentration varied vith the age of the snov. pesticide analyses were performed using vapor phase chromatographic techniques, DDT was not detected within the limit ot detectability (5 ng/1). Over half the saaples were contaminated with PCB's which raised the detectability limit to 10-50 ng/1. The PCB contamination is believed to have come from the sampling auger, as an analysis ot rinsings from it seemed to confirm. A sample taken fro* a depth of 1.5-2.5 m was acidified vith distilled nitric acid, when thawed, and analyzed forl19 elements siaultaleously using a direcl reading emission speltroseter. Four eleaents were detected: boron at 4 ng/al, cadmium at 9 ng/*l, chromium at 2 ng/al, and iron at 47 ng/ml. The high levels of cadmium and especially iron suggest contamination from the alloy steels of the auger. DESCRIPTORS: (Pesticides, *Glaciers), Chlorine aromatic compounds, DDT, Snow, Sampling, Chemical analysis. Contamination, Alloy steels, Boron, Cadmium, Chromium, Iron, Hater pollution. Sources IDENTIFIERS: Biphenyl/chloro PB-212 727/2 NTIS Prices: PC-GPO/MFSO.95-NTIS 4rt HONS 059398