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Table 7. Summary of laboratory reagent spike recoveries and laboratory reagent blanks
[mg/L; micrograms per liter; number in parentheses () represents method number; <, less than indicated detected limit; nca, not currently available; na, not applicable, see Lindsey and others, 2001; *, compound added to analytical method after June 21, 2000]

Compound Reagent spikes
Reagent blanks
Total number of analyses Mean recovery (percent) Standard deviation of recovery Number of blank detections Frequency of detection (percent) Mean concentration of detections (mg/L) Maximum concentration of detections (mg/L)
1,4-dichlorobenzene (4)
33
73.7
18.7
0
0
< 0.030
<0.030
2, 6-di-tert-butylphenol (4)
33
49.2
17.0
0
0
<.150
<.150
2, 6-di-tert-p-benzoquinone (4)
33
83.8
30.0
3
9.1
.08
.10
3-tert-butyl-4-hydroxy anisole (4)
33
51.0
26.5
0
0
<.120
<.120
4-methyl phenol (4)
33
81.2
15.8
0
0
<.030
<.030
4-nonylphenol (4)
33
84.0
18.9
2
6.1
.4
.6
4-nonylphenol monoethoxylate (4)
33
79.7
24.5
4
12.1
.5
1
4-nonylphenol diethoxylate (4)
33
76.0
28.2
1
3.0
.3
.3
4-octylphenol monoethoxylate (4)
33
80.3
22.7
6
18.2
.07
.2
4-octylphenol diethoxylate (4)
33
74.9
28.6
0
0
<.200
<.200
5-methyl-1H-benzotriazle (4)
18
59.2
16.1
0
0
<.150
<.150
Acetaminophen (3)
44
76.8
19.6
26
59.1
.016
.033
Acetophenone(4)
33
84.4
19.1
3
9.1
.05
.05
Albuterol (3)
44
74.6
12.3
0
0
<.029
<.029
cis-Androsterone (5)
nca
nca
nca
nca
nca
nca
nca
Anthracene (4)
33
80.3
19.2
1
3.0
.15
.15
Benzo (a) pyrene (4)
33
74.4
18.3
0
0
<.050
<.050
Bis (2-ethylhexyl) adipate (4)
33
82.8
36.5
2
6.1
3
5
Bis (2-ethylhexyl) phthalate (4)
33
97.6
37.6
3
9.1
7
14
Bisphenol A (4)
33
78.2
24.2
1
3.0
.6
.6
Butylated hydroxy toluene (4)
33
42.9
16.7
0
0
<.110
<.110
Caffeine (3)
44
91.9
9.4
1
2.3
.004
.004
Caffeine (4)
33
84.3
15.9
1
3.0
.009
.009
Carbaryl (4)
33
86.3
33.4
0
0
<.060
<.060
Carbodox (1)
10
97.8
13
0
0
<.01
<.01
cis-Chlordane (4)
33
83.4
25.1
0
0
<.040
<.040
Chlorpyrifos (4)
33
82.6
17.0
0
0
<.020
<.020
Chlortetracycline (1)
10
109
12.1
0
0
<.01
<.01
Chlortetracycline (2)
7
na
na
0
0
<.20
<.20
Cholesterol (4)
33
51.5
16.5
0
0
<1.500
<1.500
Cholesterol (5)
nca
nca
nca
nca
nca
nca
nca
Cimetidine (3)
44
25.6
9.8
0
0
<.007
<.007
Ciprofloxacin (1)
10
99.2
5.7
0
0
<.01
<.01
Codeine (3)*
11
63.1
6.8
0
0
<.024
<.024
Codeine (4)
33
65.0
28.8
0
0
<.200
<.200
Coprostanol (4)
33
52.4
12.6
0
0
<.600
<.600
Coprostanol (5)
nca
nca
nca
nca
nca
nca
nca
Cotinine (3)
44
71.3
9.3
0
0
<.023
<.023
Cotinine (4)
18
61.7
21.5
1
4.4
.03
.03
Dehydronifedipine (3)
44
94.0
9.6
2
4.5
.014
.025
Diazinon (4)
33
82.5
23.3
0
0
<.030
<.030
Dieldrin (4)
33
84.7
27.5
0
0
<.080
<.080
Diethylphthalate (4)
19
81.3
29.9
2
8.7
39
74
N, N-diethyltoluamide (4)
18
74.2
10.4
1
4.4
.03
.03
Digoxigenin (3)
44
90.9
16.6
0
0
<.008
<.008
Digoxin (3)*
11
20.7
12.4
0
0
<.26
<.26
Diltiazem (3)
44
72.8
9.8
3
6.8
.016
.031
1,7-dimethylxanthine (3)
44
137
62.1
2
4.5
.007
.007
Doxycycline (1)
10
92.2
8.4
0
0
<.01
<.01
Enalaprilat (3)
44
19.8
14.7
0
0
<.152
<.152
Enrofloxacin (1)
10
106
7.2
0
0
<.01
<.01
Equilenin (5)
nca
nca
nca
nca
nca
nca
nca
Equilin (5)
nca
nca
nca
nca
nca
nca
nca
Erythromycin-H2O (1)
10
116
6.9
0
0
<.01
<.01
17a-estradiol (5)
nca
nca
nca
nca
nca
nca
nca
17a-ethynyl estradiol (5)
nca
nca
nca
nca
nca
nca
nca
17b-estradiol (4)
33
71.6
35.4
0
0
<.500
<.500
17b-estradiol (5)
nca
nca
nca
nca
nca
nca
nca
Estriol (5)
nca
nca
nca
nca
nca
nca
nca
Estrone (5)
nca
nca
nca
nca
nca
nca
nca
Ethanol, 2-butoxy phosphate (4)
33
80.8
35.7
0
0
<.070
<.070
Fluoranthene (4)
33
85.5
17.9
2
6.1
.07
.07
Fluoxetine (3)
44
56.8
20.7
0
0
<.018
<.018
Gemfibrozil (3)
44
64.5
25.7
0
0
<.015
<.015
Ibuprofen (3)
44
74.5
11.6
0
0
<.018
<.018
Lincomycin (1)
10
94.7
5.1
0
0
<.01
<.01
Lindane (4)
33
85.1
22.0
0
0
<.050
<.050
Mestranol (5)
nca
nca
nca
nca
nca
nca
nca
Metformin (3)
44
1.0
0.2
0
0
<.003
<.003
Methyl parathion (4)
33
83.8
30.8
0
0
<.060
<.060
Naphthalene (4)
33
78.1
19.8
3
9.1
.03
.05
19-norethisterone (5)
nca
nca
nca
nca
nca
nca
nca
Norfloxacin (1)
10
98.5
6.4
0
0
<.01
<.01
Oxytetracycline (1)
10
97.3
7.4
0
0
<.01
<.01
Oxytetracycline (2)
7
na
na
0
0
<.20
<.20
Paroxetine metabolite (3)
30
16.6
18.9
0
0
<.26
<.26
Phenanthrene (4)
33
84.0
18.7
1
3.0
.10
.10
Phenol (4)
33
80.1
18.0
1
3.0
.08
.08
Phthalic anhydride (4)
33
52.1
23.6
5
15.2
.4
1
Progesterone (5)
nca
nca
nca
nca
nca
nca
nca
Pyrene (4)
33
84.6
16.7
1
3.0
.11
.11
Ranitidine (3)
44
32.0
10.6
0
0
<.01
<.01
Roxithromycin (1)
10
98.7
10.1
0
0
<.01
<.01
Sarafloxacin (1)
10
101
5.9
0
0
<.01
<.01
Stigmastanol (4)
20
49.7
14.9
0
0
<2.000
<2.000
Sulfachloropyridazine (2)
7
na
na
0
0
<.05
<.05
Sulfadimethoxine (1)
10
103
4.8
0
0
<.01
<.01
Sulfadimethoxine (2)
7
na
na
0
0
<.05
<.05
Sulfamerazine (1)
10
104
7.2
0
0
<.01
<.01
Sulfamerazine (2)
7
na
na
0
0
<.05
<.05
Sulfamethazine (1)
10
97.2
3.5
0
0
<.01
<.01
Sulfamethazine (2)
7
na
na
0
0
<.05
<.05
Sulfamethizole (1)
10
103
4.8
0
0
<.01
<.01
Sulfamethoxazole (1)
10
108
5
0
0
<.01
<.01
Sulfamethoxazole (3)
44
79.8
18.7
0
0
<.023
<.023
Sulfathiazole (1)
10
110
4.8
0
0
<.01
<.01
Sulfathiazole (2)
7
na
na
0
0
<.05
<.05
Testosterone (5)
nca
nca
nca
nca
nca
nca
nca
Tetrachloroethylene (4)
33
44.2
14.7
0
0
<.030
<.030
Tetracycline (1)
10
96.5
8.3
0
0
<.01
<.01
Tetracycline (2)
7
na
na
0
0
<.20
<.20
Triclosan (4)
32
79.8
23.3
5
15.6
.15
.56
Trimethoprim (1)
10
105
4.4
0
0
<.01
<.01
Trimethoprim (3)
44
75.1
8.3
2
4.5
.002
.002
Triphenyl phosphate (4)
33
80.9
21.8
0
0
<.100
<.100
Tri (2-chloroethyl) phosphate (4)
33
86.1
21.4
2
6.1
.05
.05
Tri (dichlorisopropyl) phosphate (4)
33
80.7
23.3
2
6.1
.10
.13
Tylosin (1)
10
92.3
11.7
0
0
<.01
<.01
Virginiamycin (1)
10
52.1
7.8
0
0
<.01
<.01
Warfarin (3)
44
85.2
8.4
0
0
<.001
<.001