Table 1 Structure and material composition of the mock-ups

OG

Oil

No

N/A

OG-V

Oil

Yes

N/A

OG-V-n1

Oil

Removed

Method 1

OG-V-n2

Oil

Removed

Method 2

OG-V-n3

Oil

Removed

Method 3

OG-V-n4

Oil

Removed

Method 4

WG

Water

No

N/A

WG-V

Water

Yes

N/A

WG-V-n1

Water

Removed

Method 1

WG-V-n2

Water

Removed

Method 2

WG-V-n3

Water

Removed

Method 3

WG-V-n4

Water

Removed

Method 4