16
Lead Recovery in Various Water Samples:
Our laboratory has performed numerous Spiked Recovery tests using water samples from around the
world. The water samples were obtained in the locations as identified below. The water was collected
in clean plastic bottles and shipped to our lab. The samples were not preserved by acid and not
refrigerated.
Each sample was spiked in duplicate at two different spiked concentrations (20µg/L and 50µg/L)
giving a total of four spiked tests. Except for two water samples the % recovery of spiked water
samples had an acceptable average for the four spiked water tests (/- 10%). The Highland, NC
well water averaged a 74% Recovery and the Seattle, WA municipal water averaged 83.5% Recovery.
Water sample lead (Pb
2+
) concentrations found for all samples were below 3ppb, and reported as 0,
except for Rock Hill, SC water (exposed to lead).
Water
Spiked
Spiked
Water
Sample
20ppb
%
50ppb
%
Water Origin
Type*
µg/L
ppb (µg/L)
Recovery
ppb (µg/L)
Recovery
Vienna, Austria
M
0
21
105
52
104
repeated
0
19
95
51
102
Munich, Germany
M
0
21
105
54
108
repeated
0
19
95
46
92
Kusnacht, Switzerland
M
0
20
100
51
102
repeated
0
19
95
54
108
Paris, France
M
0
19
95
50
100
repeated
0
20
100
45
90
Washington, DC
M
0
23
119
52
104
repeated
0
20
100
49
98
Philadelphia, PA
M
0
17
85
45
90
repeated
0
23
119
43
86
Phoenix, AZ
M
0
20
100
47
94
repeated
0
21
105
47
94
Edgewater, MD
W
0
22
110
50
100
repeated
0
16
80
46
92
Highland, NC
W
0
15
75
36
72
repeated
0
15
75
37
74
Rockwell, NC
W
0
22
110
51
102
repeated
0
23
119
50
100
Las Vegas, NV
M
0
19
95
52
104
repeated
0
17
85
49
98
Chicago, IL
M
0
21
105
51
102
repeated
0
16
80
52
104
Rock Hill, SC
W
0
18
90
47
94
repeated
0
17
85
46
92
Melbourne, Australia
M
0
20
100
47
94
repeated
0
19
95
45
90
Rock Hill, SC
(exposed to lead)
M
5
25
100
56
102
repeated
5
26
104
52
95
Weaverville, NC
M
0
16
80
52
104
repeated
0
20
100
46
92
Anaheim, CA
M
0
19
95
53
106
repeated
0
21
105
47
94
Seattle, WA
M
0
16
80
45
90
repeated
0
16
80
42
84
Kilowna, BC, Canada
M
0
19
95
51
102
repeated
0
21
105
53
106
*M = Municipal, W = Well
Summary of Contents for 486900-BT
Page 1: ...Smart Photometer System ...
