Table 3.

Various analytical methodology used to detect PCA formation

Analytical method	Articles identified
GC-MS	Barbin et al.[22]
	Basrani et al.[10]
	Mortenson et al.[13]
	Barbin et al.[23]
	Câmara De Bem et al.[24]
	Orhan et al.[14]
1H NMR spectroscopy	Thomas and Sem[25]
	Arslan et al.[26]
	Orhan et al.[14]
	Irmak et al.[27]
	Siddique et al.[12]
HPLC and TLC	Orhan et al.[14]
	Siddique et al.[12]
TOF-SIMS	Basrani et al.[9]
	Kolosowski et al.[11]
Infrared spectroscopy	Orhan et al.[14]
	Irmak et al.[27]
CC	Siddique et al.[12]
ESI-MS
Ultraviolet
Stereomicroscopy	Krishnamurthy and Sudhakaran[28]
XPS	Basrani et al.[9]

CC = column chromatography, ESI-MS = electron spray ionization mass spectrometry, GC-MS = gas chromatography–mass spectrometry, HPLC = high-performance liquid chromatography, TLC = thin-layer chromatography, TOF-SIMS = time-of-flight secondary ion mass spectrometry, XPS = X-ray photon spectroscopy