δ13C/12C measurements of particulate matter in Preila,

Lithuania

Andrius Garbaras

Institute of PhysicsVilnius, Lithuania

2008

Isotopic characterization of PM can play an important role in the individuation of primary and secondary sources and also in the determination of the natural/biogenic or anthropogenic/combustion contribution to the measured concentration

Stable isotopes in nature

Delta notation

sample13 3

standart

1 10R

δ C(‰)R

Rx=

[13C ][12C ]

Rx=[13C ][12C ]

R – izotopic ratio, RPDB = 0,0112372±0,0000090

Standart:C: PDB (PeeDee Belomnite)

PM characterisation by carbon isotope

PM Characterization by Carbon IsotopeC. Grassi, V. Campigli, L. Dallai, S. Nottoli, L. Tognotti, M. GuidiCite abstract as Author(s) (2007), Title, European Aerosol Conference 2007, Salzburg, Abstract T15A011

In the background and suburban sites the δ13C sow a bigger variability than in the urban sites, and this could be well correlated with the constant emissions from traffic. In background sites variability is bigger and related to the changing in the contribution from natural, secondary and anthropogenic source emissions.

Low volume samplerQuartz fibre filters24h

13C/12C can be satisfactory indicator of the origin of the atmospheric carbon

Aerosols are often a mixture and their apparent δ13C is dependent on the relative intensity of the contributing sources

Industrial combustion or vegetation fire

Marine source and natural continental sources

Widory, D. et al. (2004). Atmospheric Environment 38, 953–961.

Carbon-isotope composition of aerosols can distinquish between diesel an fuel oil, and other sources

07/05 diesel contribution about 50%. But other identification is not possible through the sole use of stable carbon isotopes

The use of isotopes for understanding airborne pollution sources is encouraging

PM2.5 PM10 Paris

He

CO2

Elemental analyser

Isotopic ratio mass spectrometer

Elemental analyserto IRMS

Isotopic ratio mass spectrometer

12C16O16O (m/z=44)13C16O16O (m/z=45)

Sampling:• Sampling for 24 h • Quartz fiber filters, preheated 600°C, 3hs• PM 2.5 sampler , flow 2.3 m3/h

Analysis:filter is cut to 1/6, put in to tin capsule and

dropped to EA

Chromatogram

3/21/2

008

3/23/2

008

3/25/2

008

3/27/2

008

3/29/2

008

3/31/2

008

4/2/20

08

4/4/20

08

4/6/20

08

4/8/20

08

4/10/2

008

4/12/2

008

4/14/2

008

4/16/2

008

4/18/2

008

-32

-31

-30

-29

-28

-27

-26

-25

-24

-23

d13C

/12C

Date

Aerosol 13C/12C measurements

3/21/2

008

3/23/2

008

3/25/2

008

3/27/2

008

3/29/2

008

3/31/2

008

4/2/20

08

4/4/20

08

4/6/20

08

4/8/20

08

4/10/2

008

4/12/2

008

4/14/2

008

4/16/2

008

4/18/2

008

-32

-31

-30

-29

-28

-27

-26

-25

-24

-23

d13C

/12C

Date

3/21/2

008

3/23/2

008

3/25/2

008

3/27/2

008

3/29/2

008

3/31/2

008

4/2/20

08

4/4/20

08

4/6/20

08

4/8/20

08

4/10/2

008

4/12/2

008

4/14/2

008

4/16/2

008

4/18/2

008

-32

-31

-30

-29

-28

-27

-26

-25

-24

-23

d13C

/12C

Date

3/21/2

008

3/23/2

008

3/25/2

008

3/27/2

008

3/29/2

008

3/31/2

008

4/2/20

08

4/4/20

08

4/6/20

08

4/8/20

08

4/10/2

008

4/12/2

008

4/14/2

008

4/16/2

008

4/18/2

008

-32

-31

-30

-29

-28

-27

-26

-25

-24

-23

d13C

/12C

Date

3/21/2

008

3/23/2

008

3/25/2

008

3/27/2

008

3/29/2

008

3/31/2

008

4/2/20

08

4/4/20

08

4/6/20

08

4/8/20

08

4/10/2

008

4/12/2

008

4/14/2

008

4/16/2

008

4/18/2

008

-32

-31

-30

-29

-28

-27

-26

-25

-24

-23

d13C

/12C

Date

Black carbon

2008

.03.21

2008

.03.23

2008

.03.25

2008

.03.27

2008

.03.29

2008

.03.31

2008

.04.02

2008

.04.04

2008

.04.06

2008

.04.08

2008

.04.10

2008

.04.12

2008

.04.14

2008

.04.16

2008

.04.18

0

1000

2000

3000

4000

5000

6000

7000

8000B

C, n

g/m

3

Date

mean

0 2000 4000 6000 8000

-32

-31

-30

-29

-28

-27

-26

-25

-24

d1

3C/1

2C

BC, ng/m3

Take home messages

carbon δ13C/12C ratio is indicator of different aerosol origin