Sample

C

(at%)

O

(at%)

Zn

(at%)

Si

(at%)

Ca

(at%)

S

(at%)

N

(at%)

Na

(at%)

Cl

(at%)

EPDM50, uncleaned reference

84.9

9.8

0.6

1.5

0.9

1.1

0.9

0.3

0.2

EPDM50, 1 h US-bath cleaning in a surfactant cleaner solution

96.9

2.1

0.1

0.4

-

0.2

0.2

0.1

-

EPDM50, wiped with acetone

85.4

10.4

0.4

1.5

1.6

0.4

0.4

-

-