Table A7. First pesticide study--Effect of no treatment.
Analyte concentration (g/L) in control A
Lindane
Heptachlor Aldrin Dieldrin
A
585
47.1
198
195
B
570
47.2
194
191
C
572
48.3
191
191
X
576
47.5
194
192
% RSD
1.4
1.4
1.8
1.2
Solution concentration (g/L)
Desorbed concentration (g/L)
after 10-min sorption
after 10 min
Material
Lindane
Heptachlor
Aldrin Dieldrin
Lindane Heptachlor Aldrin Dieldrin
PVC-A
564
43.5
172
174
7.00
LD
3.44
4.21
PVC-B
559
51.1
190
177
8.07
LD
4.37
3.94
PVC-C
571
46.1
174
177
7.75
LD
3.93
3.82
565
46.9
179
176
7.61
LD
3.91
3.99
X
% RSD
1.1
8.2
5.5
1.0
7.2
12
5.0
% initial
98
99
92
92
1.3
2.0
2.1
PTFE-A
570
48.4
175
182
3.04
0.713
2.76
5.52
PTFE-B
560
51.8
190
174
3.14
0.711
2.31
6.03
PTFE-C
559
45.2
188
176
1.97
0.624
2.30
4.93
563
48.5
184
177
2.72
0.683
2.46
5.49
X
% RSD
1.1
6.8
4.4
2.3
24
7.4
11
10
% initial
98
102
95
92
0.47
1.4
1.3
2.9
SS-A
569
47.2
173
174
13.3
LD
5.17
3.11
SS-B
557
45.1
187
174
12.0
LD
4.10
2.44
SS-C
554
46.8
189
174
11.6
LD
4.45
2.32
560
46.4
183
174
12.3
LD
4.57
2.62
X
% RSD
1.4
2.4
4.8
0
7.2
12
16
% initial
97
98
94
90
2.1
2.4
1.4
Analyte concentration (g/L) in control B
Lindane Heptachlor
Aldrin Dieldrin
A
618
34.9
197
192
B
624
37.6
179
194
C
616
36.1
195
190
619
36.2
190
192
X
% RSD
0.6
3.8
5.2
1.0
Solution concentration (g/L)
Desorbed concentration (g/L)
after 24-hr sorption
after 10 min
Material
Lindane Heptachlor
Aldrin Dieldrin
Lindane Heptachlor Aldrin Dieldrin
PVC-A
589
19.3
162
137
5.79
0.839
3.86
8.23
PVC-B
590
17.6
161
131
6.80
0.685
4.66
7.75
PVC-C
587
14.2
160
125
7.79
0.811
4.39
7.97
589
17.0
161
131
6.79
0.778
4.30
7.98
X
% RSD
0.3
15
0.6
4.6
15
11
9.5
3.0
% initial
95
47
85
68
1.1
2.2
2.3
4.2
PTFE-A
620
23.0
166
161
2.02
1.58
2.90
9.28
PTFE-B
614
22.6
165
159
2.70
1.71
3.04
9.91
PTFE-C
615
21.0
164
157
2.67
1.74
2.86
9.53
616
22.2
165
159
2.46
1.68
2.93
9.57
X
% RSD
0.5
4.8
0.6
1.3
16
5.1
3.2
3.3
% initial
99.5
61
87
83
0.4
4.6
1.5
5.0
SS-A
607
9.95
160
98.9
13.9
LD
6.43
7.81
SS-B
591
12.6
157
99.3
13.0
LD
6.11
6.04
SS-C
622
11.4
163
109
11.4
LD
5.89
6.98
607
11.3
160
102
12.8
LD
6.14
6.94
X
% RSD
2.6
12
1.9
5.6
9.9
4.4
13
% initial
98
31
84
53
2.1
3.2
3.6
MDL
0.88
0.62
0.83
0.61
23
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