Detection of phosphopeptides by IMAC‐Ga(III) from the urea‐thiourea extracts. (a–e) Show mass spectrogram mass range from 0 Da to 5000 Da, (f–j) show mass spectrogram mass range from 5000 Da to 10 000 Da, (k–o) show mass spectrogram mass range from 10 000 Da to 20 000 Da, (a, f and k) show mass spectrogram of 0 min. (b, g and l) Show mass spectrogram of incubation at 30 min. (c, h and m) Show mass spectrogram of incubation at 60 min. (d, i and n) Show mass spectrogram of incubation at 120 min. (e, j and o) Show mass spectrogram of incubation at 180 min. Arrows indicate significant peaks.