[PDF] Forensic Analysis of Blood Alcohol Concentration





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Forensic Analysis of Blood Alcohol Concentration

20 févr. 2019 This Application Note highlights the determination of blood alcohol concentration. (BAC) using the Agilent 8860 GC configured with dual ...

Application Note

Forensics

Authors

Lukas Wieder, Jie Pan, and

Rebecca Veeneman

2850 Centerville Road

Wilmington, DE 19808

Abstract

*-(W

GSQTSRIRXWSRX[SGSPYQRWXLI%KMPIRXx.

;(&&%'9-ERHXLI%KMPIRXx. &%'9- *SVIRWMG%REP]WMWSJ&PSSH%PGSLSP

Concentration

9-ERH%KMPIRXx.

;(&&%'9-GSPYQRWERHXLI %KMPIRXx%LIEHWTEGIWEQTPIV 2

Introduction

SJIXLERSPIXL]PEPGSLSP

MRXLIFPSSH

WXVIEQERHGERFIQIEWYVIHF]FPSSH

YVMRISVFVIEXLXIWXW&%'EREP]WMW

MWVSYXMRIMRQER]JSVIRWMGPEFW[MXL

EWXERHEVH[SVOJPS[GSQTVMWMRK

LIEHWTEGIWEQTPMRKERH*-(

1 x+'W]WXIQMW[IPPWYMXIHJSVVSYXMRI

EREP]WIWWYGLEW&%'7MQTPILEVH[EVI

GSRJMKYVEXMSRWWYGLEW,77

HYEPx*-(

EVIIEWMP]EGGSQTPMWLIH[MXLXLI

+'MRXIVJEGIHXS3TIR0EF'(7

ZIVWMSRERH[MPPQIIXQSWXQIXLSH

VIUYMVIQIRXW8LMW%TTPMGEXMSR2SXI

HIWGVMFIWEQIXLSHJSVHIXIVQMRMRK&%'

[MXLXLI+'HYEP*-(WERHXLI %LIEHWTEGIWEQTPIV

Experimental

Equipment

WTPMXWTPMXPIWWMRPIX770

ERHHYEP*-(W

ERHWEQTPMRK[EWTIVJSVQIHYWMRKE

%LIEHWTEGIWEQTPIV

8LI+'GERYWIYRTYVKIHJPS[

HIZMGIW-RXLMWGEWIERMRIVXXII[EW

MRWXEPPIHXSVYRXLIEREP]WMWMRXLI

HYEPGSPYQRHYEP*-(GSRJMKYVEXMSR

*MKYVIxHMWTPE]WEHMEKVEQWLS[MRKXLMW

GSRJMKYVEXMSR

Consumables

XLMW%TTPMGEXMSR2SXI8EFPIPMWXWXLI

IXLERSPWXERHEVHWSJJIVIHF]%KMPIRX

8LIWIWXERHEVHWGERFIGSQFMRIHXS

create accurate calibration standards, or

GEPMFVEXMSRGYVZI

Table 1.

ConsumablePart number

10 mL clear, crimp top, headspace vials5190-2285

Ultra Inert, low pressure drop, split inlet liner with glass wool5190-2295 Inert tee for capillary flow technologyG3184-60065 Column inlet ferrules (graphite, 0.4 mm, for 0.25 mm columns)500-2114 FID ferrules (graphite, 0.5 mm, for 0.32 mm columns)5080-8853 CFT ferrules (UltiMetal Plus Flexible Metal ferrules, 0.32 mm id)G3188-27502

ɸɸɸ123-9334UI

ɸɸɸ123-9434UI

ɸɸ160-2255-30

Table 2.

standard concentrations and

StandardPart number

20 mg/dL5190-9756

50 mg/dL5190-9757

80 mg/dL5190-9758

100 mg/dL5190-9759

150 mg/dL5190-9760

200 mg/dL5190-9761

300 mg/dL5190-9762

400 mg/dL5190-9763

Figure 1.

HSS transfer line

Deactivated

fused silica

8860 GC

7697A
headspace samplerInert tee

Column

1

J&W DB-BAC1 UI

Column

2

J&W DB-BAC2 UI

S/S Inlet FID CH 1FID CH 2 3

FSXLXLI+'ERHLIEHWTEGIWEQTPIV

YWIHMRXLMW%TTPMGEXMSR2SXI

Sample preparation

ZMEPWXSEGLMIZIIXLERSPGSRGIRXVEXMSRW

MRXLIVERKISJXSQKH08LI

MRXIVREPWXERHEVHSJ n-

EHHIHXSEGLMIZIEJMREPGSRGIRXVEXMSRSJ

QKH0

8SHIXIVQMRIVITIEXEFMPMX]IXLERSP

WXERHEVHWR!

[IVITVITEVIHEX xERHQKH0[MXLXLIMRXIVREP

WXERHEVHEXxQKH0

Table 3.

GC parameter8860 GC

Carrier gasHelium

Inlet typeSplit/splitless

Inlet temperatureɸ

Inlet pressureɸ

Split ratioɸɸ

Oven programɸɸɸ

*-(xxq'xx

Headspace parameter7697A headspace sampler

ɸHelium

Loop sizeɸ

Vial size10 mL

Vial shakingOff

Capsɸ

Vial standby flowɸ

Vial equilibration timeɸɸ

Inject timeɸɸ

GC cycle timeɸ

Oven temperatureɸɸɸ

Loop temperatureɸɸɸɸ

Transfer lineɸ

Transfer line temperatureɸɸ

:MEPJMPPxTVIWWYVITWMx

Loop fill modeCustom

Loop ramp rateɸ

Loop final pressureɸ

0SSTxIUYMPMFVEXMSRxXMQI0.05 minutes

ɸQ0QMRJSVQMRYXIWx

Carrier gas controlled by GC

4

Calibration/linearity

;(&&%'9-ERH. &%'x9-

GSPYQRWJMVWXSRXLIMRHMZMHYEPGSPYQRW

XLIRMRXLIHYEPGSPYQRHYEP*-(

GSRJMKYVEXMSR-RFSXLGEWIWEWM\PIZIP

GEPMFVEXMSRGYVZI[EWGSPPIGXIHEX

ERHQKH0IXLERSPMR

Figure 4.

SR. ;(&&%'9-MRXLIHYEPGSPYQRGSRJMKYVEXMSR 00

Relative amount

Relative response

0.5 1.0 1.5 2.0 2.5

0.51.01.52.02.53.03.5

y = 0.6822x + 0.0164 R 2 = 0.9994

Figure 5.

SR. ;(&&%'9-MRXLIHYEPGSPYQRGSRJMKYVEXMSR 00

Relative amount

Relative response

0.5 1.0 1.5 2.0 2.5

0.51.01.52.02.53.03.5

y = 0.6809x + 0.0167 R 2 = 0.9994

Figure 2.

SRXLI.

00

Relative amount

Relative response

0.5 1.0 1.5 2.0 2.5

0.51.01.52.02.53.03.5

y = 0.6621x + 0.0130 R 2 = 0.9993

Figure 3.

SRXLI.

00

Relative amount

Relative response

0.5 1.0 1.5 2.0 2.5

0.51.01.52.02.53.03.5

y = 0.6657x + 0.0145 R 2 = 0.9994 n-ɸ

ERMRXIVREPWXERHEVH6ITPMGEXIMRNIGXMSRW

Rx!x [IVIHSRIEXIEGLPIZIP *MKYVIWxERHWLS[GEPMFVEXMSRGYVZIW

JSVIXLERSPSRXLI.

;(&&%'9- ERH. &%'9-GSPYQRWMRXLI

WMRKPI

GSPYQRGSRJMKYVEXMSR

%JXIVGEPMFVEXMRKXLIGSPYQRWMRHMZMHYEPP]

ERMRIVXXII[EWMRWXEPPIHXSHIXIVQMRI

WMQYPXERISYWGEPMFVEXMSRGYVZIW

*MKYVIWxERHWLS[XLIGEPMFVEXMSR

GYVZIWJSVXLIHYEPGSPYQRHYEP*-(

GSRJMKYVEXMSR

5

Repeatability

[IVIHIXIVQMRIHEXERHQKH0

VIWTIGXMZIP]8EFPIWXS

8EFPIWLS[WXLEX67(WJSVIEGL

GSRGIRXVEXMSRERHGSPYQREVIPIWWXLER

8LIVIXIRXMSRXMQIWJSVEPPGSQFMREXMSRW

SJGSQTSYRHGSPYQRERHGSRGIRXVEXMSR

WXE]IHIWWIRXMEPP]GSRWXERXEXxSV

PIWW

General resolution test with BAC

checkout mix ;(&&%'9-ERH. 9-

GSPYQRWXLI%KMPIRXx&%'GLIGOSYXQM\

TR [EWEREP]^IHYWMRK

XLIHYEPGSPYQRGSRJMKYVEXMSR*MKYVI

WLS[WGLVSQEXSKVEQWHMWTPE]MRKXLI

WITEVEXMSRSJXLIGSQTSYRHWMRXLIQM\

SRFSXLXLI.

;(&&%'9-ERH. (&&%'9-GSPYQRW

8LIGLVSQEXSKVEQWMR*MKYVIWLS[

XLEXEPPGSQTSYRHWMRXLI&%'

GLIGOSYXQM\EVIVIWSPZIHJVSQIEGL

SXLIVSRFSXLGSPYQRWMRGPYHMRK

EGIXEPHIL]HIERHIXLERSP%PPTIEOWEPWS

WLS[W]QQIXV]SRFSXLGSPYQRW

Table 4. ɸ

EXERHQKH0SRIEGLGSPYQR

Column/concentration of ethanol15 mg/dL60 mg/dL

xx ;(&&%'9-xx

Table 5.

EXERHQKH0

Column/concentration of ethanol15 mg/dL60 mg/dL

xx ;(&&%'9-xx

Table 6. n

Column/concentration of ethanol15 mg/dL 60 mg/dL

xx ;(&&%'9-xx

Figure 6.

;x(&&%'9-&

GSPYQRW

0.80 pA 50
100
150
200
250
300
350
400
450
0 50
100
150
200
250
300
350
400
450
FID1 1 2 3 4567
8 9

101112

0.8

Time (min)

FID2 1 2 3 456
7 8 9

1011121. Methanol

2. Acetaldehyde

3. Ethanol

4. Isopropanol

5. t-Butanol

6. Propanol7. n-Propanol

8. Acetone

9. Acetonitrile

10. 2-Butanol

11. Ethyl acetate

12. 2-Butanone

A B www.agilent.com/chem

For Forensic Use.

This information is subject to change without notice.

Printed in the USA, February 20, 2019

5994-0443EN

Conclusion

E%LIEHWTEGIWEQTPIVEPPS[W

JSVMHIRXMJMGEXMSRUYERXMXEXMSRERH

GSRJMVQEXMSRSJFPSSHEPGSLSPEREP]XIW

MREWMRKPIVYRERHQIIXWQSWXQIXLSH

VIUYMVIQIRXW0MRIEVMX]SRFSXLGSPYQRW

MWI\GIPPIRXMRFSXLXLIWMRKPIERH

HYEPGSPYQRGSRJMKYVEXMSRWEWMWXLI

TVIGMWMSRJSVFSXLEVIEERHVIXIRXMSR

XMQIERHXLIEFMPMX]XSIJJIGXMZIP]

WITEVEXIEPPGSQTSYRHWSJMRXIVIWX

JVSQIEGLSXLIV8LI+'TVSZMHIW

ERIGSRSQMGEP]IXIJJIGXMZIQIXLSHSJ

HIXIVQMRMRKIXLERSPGSRGIRXVEXMSRMR

VSYXMRIEREP]WIW

Reference

&SW[IPP,%(SVQER*0

9RGIVXEMRX]SJ&PSSH%PGSLSP

Concentration (BAC) Results as

3TXMQM^EXMSRERH6SFYWXRIWW

SJ&%'%REP]WMW,IEHWTEGI

4EVEQIXIVWChromatography 2015,

quotesdbs_dbs50.pdfusesText_50
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