Compound

% Recovery* EPA 1694 method

(±RSD)

% Recovery** proposed

Method (±RSD) (n = 3)

R2 proposed method

MDL proposed method

(ng∙L−1)

MQL proposed method

(ng∙L−1)

Repeatability preliminary (±RSD) (n = 3)

Reproducibility preliminary (±RSD) (n = 6)

Chlortetracycline

95 (23)

57 (29)

0.9941

3.05

10.16

11

29

Demeclocycline

137 (2)

66 (5)

0.9973

1.22

4.08

4

5

Doxycycline

120 (1)

92 (8)

0.9889

1.99

6.62

11

11

Metacycline

-

84 (9)

0.9928

1.51

5.03

6

10

Oxytetracycline

149 (4)

87 (4)

0.9941

6.09

20.31

3

6

Tetracycline

125 (4)

78 (12)

0.9930

7.17

23.90

5

13

Dapsone

-

77 (12)

0.9958

0.67

2.24

3

14

Sulfacetamide

-

88 (5)

0.9933

1.63

5.42

6

6

Sulfadimethoxine

87 (3)

92 (3)

0.9944

0.57

1.90

4

5

Sulfamerazine

91 (1)

89 (8)

0.9965

0.52

1.73

6

9

Sulfamethazine

101 (6)

88 (5)

0.9948

0.71

2.36

2

6

Sulfamethoxazole

88 (4)

88 (8)

0.9974

2.62

8.74

8

9

Sulphaquinoxaline

-

90 (10)

0.9927

3.14

10.45

2

13

Sulfathiazole

77 (4)

80 (3)

0.9952

3.12

10.41

2

4