Table 6 Determination method of phenols.

From: Study on the spatial specificity of phenolics in fruit of different jujube varieties

Wavelength nm

Phenol extraction time min

Phenolic substances

254

22.616

P-hydroxybenzoic acid

278

24.659

Proanthocyanidin

278

21.244

Catechin

278

25.632

Epicatechin

284

38.234

Rhizoside

310

31.612

P-coumaric acid

324

33.331

Ferulic acid

326

23.002

Chlorogenic acid

355

32.203

Quercetin triglycoside

355

35.584

Kaempferol glycoside

355

36.888

Rutin

355

38.956

Quercitrin

355

39.484

Quercetin rhamnoside

370

41.944

Quercetin