Table 6.

Selected references on use of photonics/optical spectroscopy-based studies on saliva for clinical and other applications. (Other applications)

1	IR	Age and gender	2020 [Bel’skaya et al. 2020]	_
2	AAS	Metal residuals in saliva: orthodontic Appliances	2020 [Curro, and Bilello 2020]	L.O.D : μg/l
3	IR	Spectral features in tobacco smoking, periodontal diseases, and gender.	2019 [Derruau et al. 2019]	_
4	AAS	Release of nickel, chromium, and zinc in saliva; Use of orthodontic appliances	2019 [Quadras et al. 2019]	_
5	SERS	Effects of low-dose irradiation on saliva	2019 [Colceriu-Șimon et al. 2019]	_
6	LIBS	Calcium in saliva	2019 [Zahroh et al. 2019]	_
7	IR	Saliva composition	2018 [Bel’skaya et al. 2018]	_
8	ATR-FTIR	Forensic, body fluids, including Saliva	2018 [Takamura et al. 2018]	_
9	SPR	ABH antigen detection in saliva.	2017 [Peungthum et al. 2017]	_
10	LSPR	Wine astringency. Interaction of red wine and saliva	2017 [Guerreiro et al. 2017]	L.O.D : 1 μmol/L
11	LSPR	Monitoring the pH of saliva	2017 [Luo et al. 2017]	wavelengths of 665 nm and 785 nm—the sensitivities were 0.0299 a.u./pH (a.u. = arbitrary unit) with a linear range of pH = 5–8 and 0.0234 a.u./pH with linear range of pH = 2–8, respectively
12	FTIR	Effect of smoking cessation on saliva	2017 [Rodrigues et al. 2017]	_
13	TRLFS	ingestion of radioactive contaminants, time-resolved laser-induced fluorescence spectroscopy	2017 [Barkleit et al. 2017]	_
14	Raman	Forensic body fluid identification	2016 [Muro et al. 2016]	_
15	Raman	Sex determination based on saliva spectrum; forensic	2016 [Muro et al. 2016a, b]	92%
16	IR, Raman	Forensic analysis	2015 [Zapata et al. 2015]	_
17	SPRi-MS	Protein biomarkers salivary α-amylase and lysozyme.	2015 [Musso et al. 2015]	_
18	Raman	Forensic analysis	2010 [Virkler and Lednev 2010]	_