Dynamic Head y namic Heads sp space Determination p ace - PowerPoint PPT Presentation

Dynamic Head y namic Heads sp space Determination p ace Determination o Volatile Organic Volatile Organic Compounds in a Tar Compounds in a Tar B from the from the from the from the e Gulf of Mexico e Gulf of Mexico e Gulf of Mexico e Gulf of Mexico August 2011 August 2011 ITT ITT ITT ITT T | T | OI A T | T | OI A OI A OI Ana nalyti l ti lytica ti cal l

Introduction to Introduction to o Dynamic Headsp o Dynamic Headsp • Sensitive at Sensitive at lo low w parts parts per per billion billion • Complex matri Complex matric ces es • Little or no car Little or no carr ryover ry y over • Minimal sample Minimal sample Minimal sample Minimal sample e preparation e preparation e preparation e preparation • Rapid Rapid Rapid Rapid

Static vs. Dy ynamic Headspace SAMPLE VIAL SAMPLE VIAL GC GC TRAP Dynam Stati mic Headspace c Headspace

Equ Equ uilibration uilibration

St St tripping tripping

Drying Drying

In In njection njection

Baking Baking

Sample p Sample p preparation time preparation time 10 min 10 minu 10 min 10 minu ute equilibration ute equilibr ute equilibr ute equilibration ion ion 11 mi 11 11 11 i i nute stripp nu t t i t t pping i ng 1 m 1 min inute dry ute dry 1 min 1 mi nute injection ute injection 23 m 23 m 23 m 23 m min minutes total min minutes total utes total utes total

Ca Ca alibration alibration

Calibra ation Correlation Compound Compound Compound Compound 1 to 200 ppb 1 to 200 ppb 1 to 200 ppb 1 to 200 ppb Benz Benz Benzene Benzene ene ene 0.9998 0.9998 0.9998 0.9998 Toluene To Toluene To 0.9995 0.9995 0.9995 0.9995 Ethylbenz Ethylbenzene Ethylbenzene Ethylbenz ne ne 0.9985 0.9985 0.9985 0.9985 m/p m/p m/p m/p -Xylene -Xylene Xylene Xylene 0.9993 0.9993 0.9993 0.9993 o -Xylene -Xylene Xylene Xylene 0.9994 0.9994 0.9994 0.9994

Overlaid C Overlaid C Chromatograms Chromatograms

Repeata Repeata ability At 20 ppb ability At 20 ppb %RSD %RSD %RSD %RSD Compound Compound n = 7 n = 7 Benzene Benz ene 7.7 7.7 Toluene To 9.1 9.1 Ethylbenzene Ethylbenz ne 10.0 10.0 m/p -Xylene m/p -Xylene 10.2 10.2 7.0 7.0 o -Xylene -Xylene

No c No c carryover carryover

BTEX in BTEX in n BP Tar Balls n BP Tar Balls • Difficult sampl Difficult sample es • Can't run b Can't run by P y P& &T • Low Concentrat Low Concentrat Low Concentrat Low Concentrat tions tions tions tions

Oily sand Oily sand

BTEX BTEX in Oily Sand in Oily Sand

Tar Ball Tar Ball

BTEX BTEX X in Tar Ball X in Tar Ball

Con Con nclusions nclusions • Low Concentr Low Concentra ation VOA tion VOA • Fully automated Fully automated Fully automated Fully automated d • Simple to opera • Simple to opera Simple to opera Simple to opera ate ate ate ate • No carryover No carryover No carryover No carryover • Rapid Rapid

i TO TO C–CRDS C–CRDS I I Isotop sotopic Fi i i i i ingerpr i i ngerprint i i nting i ng o o Tar T ar B B Ball C B ll C ll C l C Car C C arbon b b on C C C Con onten t

Isotopic Isotopic c Fingerprinting Fingerprinting • Combust entire conte • Combust entire conte Combust entire conte Combust entire conte ents of tar ball ents of tar ball ents of tar ball ents of tar ball • Combustion products • Combustion products Combustion products Combustion products s mixed into a reservoir s mixed into a s mixed into a reservoir s mixed into a reservoir reservoir • Analyze collected CO • Analyze collected CO Analyze collected CO Analyze collected CO O 2 with CRDS for O 2 with CRDS for with CRDS for C/ with CRDS for 12 12 C/ C/ 13 C/ C 13 C C C • Compare with referen • Compare with referen Compare with referen Compare with referen nce library nce library nce library nce library Determine source Determine source source of source of • Determine • Determine of of f tar ball f tar ball f tar ball f tar ball

Cavity ring d Cavity ring d down spectrosco down spectrosco

g y

Lab weathe Lab weathe ered ered tar ball tar ball

iTOC iTOC-CRDS CRDS Analysis Analysis provide provide • Cost effective isoto • Cost effective isoto Cost effective isoto Cost effective isoto ope ratio ope ratio ope ratio ope ratio • Estimate source of • Estimate source of Estimate source of Estimate source of f organic pollution f organic pollution f organic pollution f organic pollution • Low cost • Low cost Low cost, Low cost • Low maintenance • Low maintenance Low maintenance Low maintenance • Easy to use • Easy to use Easy to use Easy to use

ww www.oico.com .oico.com