Fig. 3From: Silica-titania xerogel for solid phase spectrophotometric determination of salicylate and its derivatives in biological liquids and pharmaceuticalsThe dependence of silica-titania xerogels absorbance on pH after the contact with salicylate derivatives. λ 410 nm, time of contact with salicylate derivatives is 15 min. 1 2 × 10−3 M sodium salicylate, 2 3 × 10−3 M salicylamide, 3 2.5 × 10−3 M methylsalicylateBack to article page