Serum magnesium determined by use of methylthymol blue.
D001979:Bromthymol Blue / Q000031:analogs & derivatives; D006801:Humans; D008274:Magnesium / Q000097:blood*; D013053:Spectrophotometry
C002074:methylthymol blue; D008274:Magnesium; D001979:Bromthymol Blue