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Table 3 Relative recoveries and standard deviations of opioids in actual postmortem urine samples

From: Analysis of opioids in postmortem urine samples by dispersive liquid-liquid microextraction and high performance liquid chromatography with photo diode array detection

Analyte

Sample number

Concentration of analyte (μg ml− 1)

Added concentration (μg ml−1)

Founded concentration (μg ml− 1)

N = 3 (SD)

Relative recovery

Morphine

1

2.5

5

7.5 (1.05)

100

20

23.6 (1.19)

105.5

2

17.8

5

21.4 (0.84)

88

20

38.4 (1.57)

103

3

8.7

5

13.5 (0.41)

96

20

26.1 (0.77)

87

Codeine

1

2.2

5

7.12 (0.03)

98.4

20

21.05 (0.53)

94.3

2

5.3

5

9.98 (0.36)

93.6

20

27.24 (1.84)

109.7

3

0.9

5

5.34 (0.62)

88.8

20

17.76 (1.10)

84.3

Methadone

1

1.9

5

5.96 (1.09)

82

20

23.70 (1.31)

109

2

3.2

5

8.35 (1.2)

103

20

24.76 (1.29)

107.8

3

10.4

5

14.87 (0.57)

89.4

20

28.79 (0.12)

91.95

  1. Extraction condition: sample volume: 5 ml; pH = 9.8, volume of acetone as disperser solvent: 500 μL, volume of chloroform as extraction solvent, 300 μl and extraction time: 0.5 min