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Semi-Volatile GC and GC/MS Analysis Corexit 9500 and Corexit 9527

Semi-Volatile GC and GC/MS Analysis Corexit 9500 and Corexit 9527. Preliminary Data [Note: this ppt was updated on 6/4/10 by adding slide 4, list of chemicals in Corexit as modified by Nalco]. Potential Chemicals in Corexit.

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Semi-Volatile GC and GC/MS Analysis Corexit 9500 and Corexit 9527

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  1. Semi-Volatile GC and GC/MS Analysis Corexit 9500 and Corexit 9527 Preliminary Data [Note: this ppt was updated on 6/4/10 by adding slide 4, list of chemicals in Corexit as modified by Nalco]

  2. Potential Chemicals in Corexit The following list of chemicals has been developed for distribution by EPA. Slide distributed by Alpha 6-3-10 updated common names and molecular weights by Nalco 6-4-10 * CAS and chemical name Information provided by Nalco to EPA

  3. Potential Chemical in Corexit[Original slide as presented prior to updating by Nalco] The following list of chemicals has been developed for distribution by EPA. Ester surfactants

  4. Comparative GC/FID Chromatograms Corexit 9500 TPHC9-C40= 486,000 mg/Kg (49% recoverable TPH) I.S. I.S. I.S. I.S. I.S. I.S. Corexit 9527 5.00 10.00 15.00 20.00 25.00 30.00 35.00 40.00 45.00 50.00 55.00 60.00 65.00 70.00 TPHC9-C40=440,000 mg/kg (44% recoverable TPH) I.S. I.S. I.S. C10 C15 C20 C30 C40 C8 5.00 10.00 15.00 20.00 25.00 30.00 35.00 40.00 45.00 50.00 55.00 60.00 65.00 70.00

  5. Tentatively Identified Compounds (GC/MS)Corexit 9500 5 3 2 • Compound Key • 2-ethylhexanol • Diethoxymethane • C9-C14 petroleum distillates • Bis-(2-ethylhexyl)malate • Branched chain ester A • Branched chain esters Corexit 9500 I.S. I.S. I.S. 5.00 10.00 15.00 20.00 25.00 30.00 35.00 40.00 45.00 50.00 55.00 60.00 65.00 70.00 4 6 1 C10 C15 C20 C30 C40 C8

  6. Abundance 59.2 2300000 2200000 2100000 2000000 1900000 1800000 1700000 1600000 1500000 1400000 1300000 1200000 1100000 103.1 1000000 900000 800000 700000 600000 500000 400000 300000 200000 86.1 146.2 100000 73.1 131.2 116.2 172.2 191.2 159.1 217.1 0 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 m/z--> Mass Spectra of Major PeaksCorexit 9500 Peak #2 Diethoxymethane

  7. Abundance 70.2 1100000 1000000 112.2 900000 800000 700000 600000 500000 400000 211.2 300000 200000 100000 183.2 283.3 142.1 311.3 243.2 339.3 446.1 0 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 m/z--> Mass Spectra of Major PeaksCorexit 9500 Peak #5 Branched chain ester

  8. Tentatively Identified Compounds (GC/MS)Corexit 9527 1 5 • Compound Key • 2-butoxyethanol • 2-ethylhexanol • 2-(2-butoxyethoxy)ethanol • C9-C14 petroleum distillates • Branched chain ester A • Branched chain esters I.S. I.S. I.S. 4 6 Corexit 9527 3 2 I.S. I.S. I.S. C10 C15 C20 C30 C40 C8 5.00 10.00 15.00 20.00 25.00 30.00 35.00 40.00 45.00 50.00 55.00 60.00 65.00 70.00

  9. Abundance 57.2 1800000 1700000 1600000 1500000 1400000 1300000 1200000 1100000 1000000 900000 800000 700000 600000 87.1 500000 400000 300000 75.1 200000 100.2 100000 118.2 131.1 206.9 0 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 m/z--> Mass Spectra of Major PeaksCorexit 9525 Peak #1 2-butyoxyethanol

  10. Abundance 70.2 1100000 1000000 112.2 900000 800000 700000 600000 500000 400000 211.2 300000 200000 100000 183.2 283.3 142.1 311.3 243.2 339.3 446.1 0 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 m/z--> Mass Spectra of Major PeaksCorexit 9525 Peak #5 Branched chain ester

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