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Table 7 Comparison of the analytical ranges of various spectrophotometric methods of AA determination

From: Silica-titania xerogel doped with Mo,P-heteropoly compounds for solid phase spectrophotometric determination of ascorbic acid in fruit juices, pharmaceuticals, and synthetic urine

Method Reagent or sensor material Linear range, mg/L Reference
Spectrophotometry 2,6-Dichloroindophenol 1–20 [7]
p-Aminobenzoic acid 20–67 [8]
Diazotized 1-aminoanthraquinone 5–25 [9]
Fe(III)- 2,4,6-tripyridyl-s-triazine 2–40 [10]
Fe(III)-ferrozine 0.2–10 [11]
Fe(III) 1,10-phenantroline 1–80 [12]
Cu(II)-neocuproine 1.4–14 [13]
V,W,P-HPC 1–80 [14]
V,W,P-HPC 2–24 [15]
UV absorbance 2.5–30 [16]
Solid phase spectrophotometry Sephadex QAE A-25, UV absorbance 0.3–5.0 [16]
Silica xerogel doped with Mo,P-HPC 1–50 [17]
Bindschedler’s Green immobilized on SiO2–SO3H 0.3–5 [27]
Silica-titania xerogel 6–110 [29]
Silica-titania xerogel doped with Mo,P-HPC 2–200 Present work