Table 4: Data on linearity.

Standards λmax (nm) Calibration range (μg/mL) Linear equation R2 LOD (μg/mL) LOQ (μg/mL)
3,4-DHBA 258 2.5-250 y=63.077x+30.238 0.9999 1.0 2.5
2,5-DHBA 235 2.5-250 y=27.504x+25.623 0.9997 2.0 2.5
2,3-DHBA 247 2.5-250 y=28.555x−41.925 0.9995 2.0 2.5
2,4-DHBA 258 2.5-250 y=55.925x−21.311 0.9998 2.0 2.5
SA 235 2.5-250 y=24.742x−6.336 0.9999 2.0 2.5

R2: correlation coefficient DHBA: dihydroxybenzoic acid; SA: salicylic acid

Back to Article