SGS Group Germany - Renare Mark · SEMINAR – UPPSALA How to measure chlorinated aliphatics (vinyl...

SEMINAR – UPPSALA

How to measure chlorinated aliphatics (vinyl chloride)

in indoor air with low enough LOQ

Dr. Hans Ulrich Dahme

February 5th

© SGS Société Générale de Surveillance Holding (Deutschland) GmbH – 2014 – All rights reserved – SGS is a registered trademark of SGS Group Management SA 2

AGENDA

1. Introduction

2. Legal Background of VOC

3. Sampling and Analysis of VOC

4. TO15 EPA Method VOC

5. Conclusion


A BRIEF HISTORY OF SGS

SGS - Société Générale de Surveillance

Founded in Rouen (France) in 1878

First registered as Société Générale de

Surveillance in Geneva 1919

More than 80,000 employees worldwide

Global network of over 1,650 offices and

laboratories

Current structure initiated in 2001 and

comprised of ten business units


BUSINESS APPROACH

Governments &

Institutions

Services

BUILDING TRUST THROUGHOUT THE SUPPLY CHAIN

FROM THE FIELD TO THE CONSUMER

Agricultural

Services

Automotive

Services

Consumer

Testing

Services

Life

Science

Services

Oil, Gas &

Chemicals

Services

Minerals

Services

Environmental

Services

Industrial

Services

Systems &

Services

Certification


DEFINITION OF VOC

Organic compounds with boiling range:

(50-100 °C to 240-260 °C) (WHO 1989)

Organic compounds with vapour pressure

greater than 10-1 (25 °C and 1013 mbar)

Range: n-Hexane and n-Hexadecane

Alkane, alkene and cycloalkene, aromatic

compounds, terpene, alcohols, ketones,

ester, glycol ether, halogenated

compounds


EMISSIONS, THE WORK PLACE, AND SOIL AIR

Indoor air

Only few limits available

Emissions

Federal Emissions Regulations:

BlmschV

Technical Instructions on Air: TA Air

Association of German Engineers: VDI

The Work Place

Technical Rules for Hazardous

Substances: TRGS 900

Soil Air

Federal Soil Protection Ordinance:

BBoschV

– Assessment value for decontamination


LEGAL BACKGROUND:

INDOOR AND OUTDOOR AIR

Dichloromethane

Commission Indoor Hygiene Germany

– Approximate Value* II 2000 µg/m3

– Approximate Value* I : 200 µg/m3

WHO Air Quality Guideline for Europe

– Guide value*, **: 3000 µg/m³

* Indoor (time reference 24 h)

** Outdoor (time reference 24 h)

*** WHO Air Quality Guideline for Europe

COMPOUND CONCENTRATION

[µG/M³]

TIME

REFERENCE

CANCER

RISK***

Vinylchloride VC 1 Lifetime 1*10-6

Benzene 1 Lifetime 6*10-6


SAMPLING OF HALOGENATED COMPOUNDS

VDI 4300 page 6 – Indoor air

(Association German Engineer – VDI)

VDI 3865 pages 1-3 Soil air

Pump (0.3l/minutes up to 10l/minutes)

Contaminated sites – 5 to 10 l

Sampling time – 5 to 60 minutes


ABSORBENT MATERIALS FOR VOC

TENAX (TVOC) – DIN 16000-6

Anasob 747 – VDI 2100 page 2

Typ G – Halogenated compounds

Headspace glass – Vinyl Chloride (VC)

Tedlar bags

Passive samplers

Advantage – Low cost of analysis

Disadvantage – Experts for sampling

Disadvantage – High LOQ for VC

(2 mg/m³) for headspace method


TO15 EPA METHOD

VOC in air collected in evacuated

canisters

Canister with coating [Silonite]

Various certified VOC standards –

97 compounds are possible

Measurements with GC-MS


SAMPLING OF VOC WITH CANISTER

No other sampling equipment for indoor

air is required (Canister + sampling top)

Fill the canister with air for 30 seconds,

90 minutes, or 12 hours

Close the canister after sampling and

send the canister to the laboratory


CANISTER PREPARATION

Stove for canister cleaning (70°C)

Flush the canister 7 times with nitrogen;

evacuate

Check the concentration of compounds

in the canister after cleaning

Evacuation (10-1 mTorr)

Send the canister to the client


STANDARD PREPARATION

Standard preparation will be carried out

in canister, too

Mass flow controller

Certified gas standard

Determination of VOC concentration

with GC-MS

MDL (0.2 µg/m³)

Reporting Limit RL studies (0.6 µg/m³)

Normal measured concentration

1.8 µg/m³


VOC MEASUREMENT

Auto sampler

Mass flow controller

GC-MS

Accumulation of 400 ml sample on

Tenax trap by -70 °C

Heating the trap

Separate the different compounds with

gas chromatography

(Coulomb 60 m – DB 624)

Detection with mass spectrometry -

Agilent Quadrupole


CONCLUSION: ADVANTAGES OF METHOD

Low LOQ [µg/m³]

97 compounds are possible

Check unknown peaks with MS

database (250000 compounds)

screening

Dilute samples from canister e.g. 40 ml

Multiple measurement

With equipment modification, other

compounds are possible


CONCLUSION – DISADVANTAGES OF METHOD

High cost of certified standards

Standards are only valid for one year

Canister approx. 8800 kr

Investment for equipment 15000000 kr

Canister handling – e.g. cleaning

Manual work for screening of unknown

substances


CONTACT

THANK YOU FOR YOUR ATTENTION!

Dr. Hans Ulrich Dahme

Regional Sales Manager

SGS INSTITUT FRESENIUS GmbH

Am Technologiepark 10

D-45699 Herten

T +49 2366 305617

M +49 163 6688675

[email protected]

www.sgs.com

mailto:[email protected]

http://www.sgs.com/

WWW.SGS.COM

WWW.SGSGROUP.DE

SGS Group Germany - Renare Mark · SEMINAR – UPPSALA How to measure chlorinated aliphatics (vinyl...

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