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publications > open file report > OFR-00-327 > table 3

Regional Geochemistry of Metals in Organic-Rich Sediments, Sawgrass and Surface Water, from Taylor Slough, Florida

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If you would like to review this table in its entirety, the excel file has been provided. Download Table 3 excel file.

Table 3. Quality control for the inductively coupled plasma-atomic emission spectrometry analysis of organic-rich sediment material.

Laboratory number LLD¹ 2 0.005 10 8 1 1 10 0.005

Element Ag, ppm Al, % As, ppm Au, ppm Ba, ppm Be, ppm Bi, ppm Ca, %

Mean 3.1 6.3 43 -- 805 2.7 -- 0.55

%RSD² 22% 2% 11% -- 3% 18% -- 4%

Target Value³ 3.1 6.09 37 0.345 764 2.4 1.33 0.58

% Difference⁴ 1.4 2.2 17% -- 5.3% 13% -- -5%

C-100587 SAR-M⁵ 3.0 6.1 39 <8 781 2.0 <10 0.53

C-100595 SAR-M⁵ 2.0 6.1 38 <8 788 2.0 <10 0.53

C-100610 SAR-M⁵ 3.0 6.4 45 <8 818 3.0 <10 0.56

C-100622 SAR-M⁵ 3.0 6.3 49 <8 807 3.0 <10 0.58

C-100636 SAR-M⁵ 3.0 6.4 50 <8 838 3.0 <10 0.57

C-100650 SAR-M⁵ 4.0 6.2 41 <8 789 3.0 <10 0.55

C-100665 SAR-M⁵ 4.0 6.3 40 <8 813 3.0 <10 0.56

Laboratory number LLD¹ 2 5 2 2 2 2 0.005 4

Element Cd, ppm Ce, ppm Co, ppm Cr, ppm Cu, ppm Eu, ppm Fe, % Ga, ppm

Mean 3.7 122 11 89 340 -- 4.30 23

%RSD² 13% 4% 7% 11% 3% -- 3% 12%

Target Value³ 4.8 120 11 101 320 0.67 3.2 20

% Difference⁴ -23% 2% 0% -12% 6.3% -- 4.4 14%

C-100587 SAR-M⁵ 3.0 116 10 93 325 <2 3.22 23

C-100595 SAR-M⁵ 3.0 122 10 88 329 <2 3.26 18

C-100610 SAR-M⁵ 4.0 125 11 67 342 2 3.38 23

C-100622 SAR-M⁵ 4.0 125 12 91 351 2 3.47 26

C-100636 SAR-M⁵ 4.0 126 12 97 350 <2 3.44 26

C-100650 SAR-M⁵ 4.0 116 11 93 334 2 3.36 22

C-100665 SAR-M⁵ 4.0 125 11 92 350 <2 3.40 22

Laboratory number LLD¹ 4 0.005 2 2 0.005 4 2 0.005

Element Ho, ppm K, % La, ppm Li, ppm Mg, % Mn, ppm Mo, ppm Na, %

Mean -- 3.10 54 34 0.457 5450 13.0 1.20

%RSD² -- 9% 3% 6% 3% 2% 7% 2%

Target Value³ 1.7 2.9 61 30 0.5 5200 12 1.19

% Difference⁴ -- 5.9% -11% 13.3% -4.0% 4.8% 13.1% -0.8%

C-100587 SAR-M⁵ <4 3.13 51 32 0.462 5280 12.0 1.16

C-100595 SAR-M⁵ <4 3.19 56 32 0.467 5330 13.0 1.17

C-100610 SAR-M⁵ <4 3.23 56 37 0.488 5440 13.0 1.23

C-100622 SAR-M⁵ <4 3.20 55 34 0.485 5520 14.0 1.19

C-100636 SAR-M⁵ <4 3.22 56 36 0.499 5530 15.0 1.20

C-100650 SAR-M⁵ <4 3.18 53 33 0.473 5450 14.0 1.16

C-100665 SAR-M⁵ <4 2.49 54 34 0.485 5590 14.0 1.16

Note: This is a continuation of table above.

Laboratory number LLD¹ 4 9 3 0.005 4 2 5

Element Nb, ppm Nd, ppm Ni, ppm P, % Pb, ppm Sc, ppm Sn, ppm

Mean 35 55 43 0.100 1020 8 --

%RSD² 13% 9% 3% 3% 3% 11% --

Target Value³ 31 51 41 0.08 960 8.3 9.4

% Difference⁴ 15.2% 8.7% 3.8% -13.6% 6.1% -0.2% --

C-100587 SAR-M⁵ 33 46 41 0.067 984 7 <5

C-100595 SAR-M⁵ 27 51 42 0.068 994 7 <5

C-100610 SAR-M⁵ 39 58 42 0.070 1050 9 6

C-100622 SAR-M⁵ 39 58 44 0.072 1030 9 <5

C-100636 SAR-M⁵ 39 58 44 0.072 1050 9 <5

C-100650 SAR-M⁵ 34 59 42 0.068 990 8 5

C-100665 SAR-M⁵ 39 58 43 0.067 1030 9 <5

Laboratory number LLD¹ 2 40 6 0.005 100 2 2

Element Sr, ppm Ta, ppm Th, ppm Ti, ppm U, ppm V, ppm Y, ppm

Mean 147 -- 19 0.293 -- 66 30

%RSD² 3% -- 8% 16% -- 3% 9%

Target Value³ 156 1.3 18 0.35 2.6 66 33

% Difference⁴ -5.8% -- 4.0% -3.1% -- -0.4% -9.5%

C-100587 SAR-M⁵ 141 <40 17 0.302 <100 62 28

C-100595 SAR-M⁵ 142 <40 18 0.298 <100 64 25

C-100610 SAR-M⁵ 148 <40 20 0.359 <100 68 31

C-100622 SAR-M⁵ 148 <40 19 0.363 <100 67 31

C-100636 SAR-M⁵ 150 <40 21 0.350 <100 68 33

C-100650 SAR-M⁵ 149 <40 17 0.354 <100 65 29

C-100665 SAR-M⁵ 151 <40 19 0.348 <100 66 32

Note: This is a continuation of table above.

Laboratory number LLD¹ 1 2

Element Yb, ppm Zn, ppm

Mean 3 990

%RSD² 15% 3%

Target Value³ 3.2 890

% Difference⁴ 2.7% 11.5%

C-100587 SAR-M⁵ 3 965

C-100595 SAR-M⁵ 3 938

C-100610 SAR-M⁵ 3 1020

C-100622 SAR-M⁵ 3 1010

C-100636 SAR-M⁵ 4 1020

C-100650 SAR-M⁵ 3 970

C-100665 SAR-M⁵ 4 1010

¹ LLD, lower limit of analytical determination (ppm or percent).
² Percent relative standard deviation.
³ Value considered most acceptable by USGS quality control staff.
⁴ Percent difference between mean and target values. Anything >20% must be interpreted with caution.
⁵ Analytical value for USGS blind, standard reference materials.

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Last updated: 17 March, 2005 @ 02:43 PM (KP)