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Table 2 Determination of AA DA, and UA in human urine samples (n = 4)

From: Simultaneous and sensitive determination of ascorbic acid, dopamine and uric acid via an electrochemical sensor based on PVP-graphene composite

Samplesa Detected a/µM Added/µM Foundb/µM Recovery/ %
AA DA UA AA DA UA AA DA UA AA DA UA
Urine 1 2.57 (± 0.09) 10.0 10.0 2.0 10.25 (± 0.42) 10.18 (± 0.37) 4.63 (± 0.19) 102.5 101.8 103.0
Urine 2 1.58 (± 0.08) 50.0 5.0 1.0 48.67 (± 1.86) 5.27 (± 0.26) 2.56 (± 0.10) 97.3 105.4 98.0
Urine 3 3.16 (± 0.14) 20.0 2.0 3.0 20.36 (± 0.94) 2.07 (± 0.09) 6.09 (± 0.28) 101.8 103.5 97.7
  1. aAll human urine samples were collected from the laboratory personnel
  2. bAverage ± confidence interval, the confidence level is 95%