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Table 6 Recovery test of solid phase spectrophotometric determination of ascorbic acid in the synthetic urine (n = 3, P = 0.95)

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

Added, mg/L Found, mg/L RSD,  % Recovery, %
20.0 20.54 ± 2.56 7.3 102.7
30.0 28.88 ± 1.17 2.4 96.3
50.0 49.76 ± 1.47 1.7 99.5