Direct trace element determination in oil and gas produced waters with inductively coupled plasma - Optical emission spectrometry (ICP-OES): Advantages of high salinity tolerance - Jubb, Aaron M.; Engle, Mark; Chenault, Jessica; Blondes, Madalyn; Danforth, Cloelle; Doolan, Colin; Gallegos, Tanya; Mueller, Dan; Shelton, Jenna (Geostandards and Geoanalytical Research, 2020)