new type of add-on monitor for continuous pah nano particles surface soot by hans grimm

New type of Add-on Monitor forNew type of Add-on Monitor for

Continuous PAH Continuous PAH Nano Particles SurfaceNano Particles Surface

SOOTSOOT

by Hans Grimmby Hans Grimm

International Sales Meeting 2008

AGENDAMotivation

Technical Solution

Specification

Application Examples

International Sales Meeting 2007

Apart from the PM values and the Size Distribution there is a growing interest to get a deeper insight in the composition of dust.

Chemical analysis requires a lot of time, is expensiv and very often complicated.

Therefore sensors are needed to provide fast, reliable and unexpensive data.

International Sales Meeting 2007

What are PAH´s

PAH: Polycyclic Aromatic Hydrocarbons

PAHs are organic molecules consisting of between 2 and 6 Benzene rings.

PAHs are solids at room temperature

Almost all five-ring compounds are particulate bound

Typical PAH´s

Why measure PAH ?

• PAH are known or suspected to be carcinogenic

• Particle bound PAH are attached to small particles

• Obtain additional information about particles in a size below 250 nm

•Sources are

natural: volcanoes and natural fires

Anthropogenic: combustion, vehicle exhaust, cigarette and wood smoke,

New speciation technologies

- Particle bound PAH

- Soot Particle

Measuring Principle

The sample flows continuously into the PAH sensor and through the excimer- lamp ionization region. Here particle-bound PAH molecules are ionized particle-bound PAH molecules are ionized by photoelectric effect and loose an electron.

The charged particles are captured on a filter in an electrometer.

The flow of electrons to neutralize the particles for a current which is corllated to the particle concentration.

Installation in Environcheck #107

Sensor module

#130 PAH sensor installed in #365

#130 PAH sensor attached to #107

PAH-Data

Measurement principle: Photoionisation for detection of particle-bound PAHs

Range: max. 0 to 5000 fA

Substance sensitivity: ~ 1 ng/m3 (to be verified)

Data rate: < 6 s to 2h

Air flow: 1.2 l/min (external)

Pressure range: 1013 ± 100 mbar

User interface: RS-232 / 1-Wire / I2C

Analog output: 0 to 5 V (1 to 4 V = 0 to 500 fA or 0 to 5000 fA)

Dimensions (LWH): 240 x 75 x 75 mm

Weight: 1.8 kg

Power requirements: 18 VDC (nominal), max. 1.2 A (Peak)

# 130 Specifications

PAH Data from Hallein/Austria

Hallein 11.08.04 bis 31.08.04PAH Temp rH

0

50

100

150

200

250

300

350

400

450

PA

H [

fA]

0

10

20

30

40

50

60

70

80

90

100

Te

mp

era

ture

[°C

] -

Hu

mid

ity

[%]-

PM

1 [

µg

/m³]

PAH-Signal [fA] PM-1 Temp.:(°C) Humidity(%rH)

Mi DiMoSoSaFrDo Mi DiMoSoSaFrDo Mi MoSoSaFrDo

PAH Data from Hallein/AustriaHallein 11.08.04 bis 31.08.04

PAH PM2.5 PM1

0

50

100

150

200

250

300

350

400

450

PA

H [

fA]

0

10

20

30

40

50

60

70

PM

1

PM

2.5

[µ

g/m

³]

PAH-Signal [fA] PM-1 PM-2.5

Mi DiMoSoSaFrDo Mi DiMoSoSaFrDo Mi MoSoSaFrDo

The „smoke chamber“:

- A room with ~ 15 m3 filled up with cigarrette smoke during the coffee brake

- Windows opened for continous dilution over the night period

Smoke Application

PAH Smoke Resultsthe "smoke chamber"

0

50

100

150

200

250

22.8.05 13:37

22.8.05 14:49

22.8.05 16:01

22.8.05 17:13

22.8.05 18:25

22.8.05 19:37

22.8.05 20:49

22.8.05 22:01

22.8.05 23:13

23.8.05 0:25

23.8.05 1:37

23.8.05 2:49

23.8.05 4:01

23.8.05 5:13

time

PM

[µ

g/m

^3]

, P

AH

[fA

], M

ean

Dp

[n

m]

1

10

100

1000

10000

100000

1000000

tota

l <

300

nm

/ t

ota

l >

300

nm

[P

/ccm

]

PM 10 / PM 2.5 / PM 1.0

total Ultrafine < 350 nm

total > 300 nm

Pressure

rel.humidity

temperatureDp mean

PAH

New sensors integrated in #365

*Patent by A. Schmidt-Ott (TU-Delft), H. Burtscher (FH Aargau)

The world-wide first PORTABLE nanoparticle detector The world-wide first PORTABLE nanoparticle detector for aerosol exposure monitoring !for aerosol exposure monitoring !

*Patent by A. Schmidt-Ott (TU-Delft), H. Burtscher (FH Aargau)

-total number concentration-total surface area

-mean diameter Dp

-the surface area of particles deposited in the lung*

The world-wide first PORTABLE nanoparticle detector The world-wide first PORTABLE nanoparticle detector for aerosol exposure monitoring !for aerosol exposure monitoring !

NEW-NanoCheck*

electrical, unipolardiffusion charger

conductivity measurement

faraday cupelectrometer

*Patent by A. Schmidt-Ott (TU-Delft), H. Burtscher (FH Aargau)