. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder . 33A n-n 1 1 1 1 1 0 0 10 20 30 40 50 r niles niw :l_ 1 1 1 65 61 169 167 165 163 161 Figure 25-lb. Locations of Norton Sound stations. •1976 stations; + 1977 stations; M979 stations. internal diameter () ratio of 20:1 was packed with a weight ratio of 100 parts alumina and 200 parts silica to one part sample. Elution with two column volumes each of hexane, benzene, and methanol was carried out. The benzene fractions were further purified by thin-layer chromatography on silica ge
. The Eastern Bering Sea Shelf : oceanography and resources / edited by Donald W. Hood and John A. Calder . 33A n-n 1 1 1 1 1 0 0 10 20 30 40 50 r niles niw :l_ 1 1 1 65 61 169 167 165 163 161 Figure 25-lb. Locations of Norton Sound stations. •1976 stations; + 1977 stations; M979 stations. internal diameter () ratio of 20:1 was packed with a weight ratio of 100 parts alumina and 200 parts silica to one part sample. Elution with two column volumes each of hexane, benzene, and methanol was carried out. The benzene fractions were further purified by thin-layer chromatography on silica gel plates developed in CH2CI2 to remove the methyl esters. The gas chromatographic analysis of the hexane fractions was carried out using a Hewlett- Packard Model No. 5830A instrument, equipped with a linear temperature programmer, FID detector, and electronic integrator. A glass SCOT column, 50 m X mm , coated with OV-101 (SGE Scientific, Inc.) was used. The column was tempera- ture-programmed from 100 C to 275 C at 2 C/min. with helium carrier gas flow of 4 ml/min. and held isothermally for 60 min. Norton Sound sediment samples were extracted with methanol for 24 hours to avoid freeze-drying, then with toluene:methanol for 76 hours and proc-
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