Analytical Considerations Mike Erickson

ebcne.org

Analytical Considerations Mike Erickson

Analytical Considerations

Mike Erickson

Con-Test Analytical Laboratory


A Laboratory Perspective

Michael Erickson


PCB Structure


PCB 18

Aroclor 1242

• Aroclors are comprised of varying ratios of the 209 PCB congeners

• Aroclor mixtures are characterized by the amount of chlorine they

contain (i.e. 1242 contains 42% chlorine)


PCB Homologues

IUPAC # Compounds Isomer Class Homologues

1 2-Chlorobiphenyl 1 Cl

2 3-Chlorobiphenyl 1 Cl Monochlorobiphenyl

3 4-Chlorobiphenyl 1 Cl

4 2,2'-Dichlorobiphenyl 2 Cl

5 2,3-Dichlorobiphenyl 2 Cl

6 2,3'-Dichlorobiphenyl 2 Cl

7 2,4-Dichlorobiphenyl 2 Cl

8 2,4'-Dichlorobiphenyl 2 Cl

9 2,5-Dichlorobiphenyl 2 Cl

10 2,6-Dichlorobiphenyl 2 Cl Dichlorobiphenyl

11 3,3'-Dichlorobiphenyl 2 Cl

12 3,4-Dichlorobiphenyl 2 Cl

13 3,4'-Dichlorobiphenyl 2 Cl

14 3,5-Dichlorobiphenyl 2 Cl

15 4,4'-Dichlorobiphenyl 2 Cl

16 2,2',3-Trichlorobiphenyl 3 Cl Trichlorobiphenyl

. . . .

. . . .

. . . .

206 2,2',3,3',4,4',5,5',6-Nonachlorobiphenyl 9 Cl

207 2,2',3,3',4,4',5,6,6'-Nonachlorobiphenyl 9 Cl Nonachlorobiphenyl

208 2,2',3,3',4,5,5',6,6'-Nonachlorobiphenyl 9 Cl

209 2,2',3,3',4,4',5,5',6,6'-Decachlorobiphenyl 10 Cl Decachlorobiphenyl


Dioxin-like Compounds

Tetrachlorodioxin PCB 77

PCB 54

• Similar geometry (planar) and chlorine substitution pattern

• Of the 209 congeners 12 are dioxin-like

• Three most toxic congeners include PCB 77, 126 & 169 (nonortho

substitution)


PCB Extraction Methods

• SW-846 3540C Soxhlet Extraction (TSCA, Region 1)

• SW-846 3550C Ultrasonic Extraction

• SW-846 3545A Pressurized Fluid Extraction (PFE)

• SW-846 3546 Microwave Extraction

• SW-846 3510C Liquid-Liquid Extraction

• SW-846 3535 Solid Phase Extraction


SW-846 3540C Soxhlet Extraction


Analytical Methods

• SW-846 8000C

• SW-846 8082

• Water, Soil, Sediment

• Wipes, Paint, Caulking

• TO-10A, TO-4

• Air – PUF

• EPA 680

• Homologues

• SW-846 8270 Modified

• Congeners


Clean up Methods

• SW-846 3665A Sulfuric Acid Clean up

• Elevated baselines

• Complex chromatograms

• SW-846 3660B Suflur Clean up

• Elemental Sulfur in many sediments

• Solubility is similar to PCBs

• SW-846 3620C Florisil Cartridge Clean up

• Polar hydrocarbons

• Other polar material

• Enhanced Florisil column Clean up

• Primarily for troublesome caulking


Aroclor 1242 “under” sulfur peak


Aroclor 1242 with Sulfur Interference Removed


Enhanced Florisil with Interference Removed


PCB in Air Sampling

HIGH VOLUME

Polychlorinated are sampled

on a PUF(polyurethane foam)

cartridge. High volume

samples are taken on large

high volume PUF’s by EPA

Method TO-4A. Low volume

samples can be taken by EPA

Method TO-10A.

LOW VOLUME


PCB’s in Caulking, Air, Wipes…

Typical Reporting Limits

‣ PCB Aroclors in Air*

• TO-4A (High Volume)

0.062-0.62 ng/m3

• TO-10A (Low Volume)

0.0028-0.83 ug/m3

Optional

• NIOSH 5503*

0.069-2.0 ug/m3

* RL calculated from sample volume

‣ PCB 8082 in caulking/paint


Thank you

Any Questions

Michael Erickson

merickson@contestlabs.com

413-525-2332

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