From: A method for the determination of ZnDDP in lubricant oils by applying solid-phase extraction with mixed resin
Sample
Result (µg/mL)
Gasoline engine oil (0W-20)
1.039 ± 0.19
Diesel engine oil (0W-30)
0.586 ± 0.15
Transmission oil (DCTF)
0.863 ± 0.19
Transmission oil (SP4MI)
0.305 ± 0.09