Table 3. Regression equation between Raman intensities and concentrations of MTZ and their coefficient of determination (R²).

Raman Peaks	Regression Equation	R2	Dynamic linear range (M)	LOD*(M)
1359 cm−1	y = 292.43x + 3409.8	0.9976	10−6–10−11	1.43 × 10−12
1320 cm−1	y = 144.97x + 1651.9	0.9921	10−6–10−11	2.67 × 10−12
498 cm−1	y = 124.14x + 1479	0.9744	10−6–10−11	3.71 × 10−12
427 cm−1	y = 63.771x + 739.39	0.9651	10−6–10−11	0.91 × 10−11

^*LOD: limit of detection.