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Table 6. Percent Accuracy of Surrogate Predictions for Soils

Table 6. Percent Accuracy of Surrogate Predictions for Soils
Soil #1a Soil #2b Soil #3b
vacuum spike water spike vacuum spike water spike vacuum spike water spike
compound
dichlorodifluoro- methane 21 15 1 78 17 0 72 19 7 82 20 62 86 26 8 450 77 79
chloromethane 65 13 2 86 7 0 79 16 7 92 11 63 94 22 9 140 11 24
vinyl chloride 71 14 2 88 11 0 87 19 7 85 13 63 98 27 9 106 8 17
bromomethane 78 9 1 94 11 0 99 7 5 99 12 61 105 18 5 420 11 38
chloroethane 72 9 1 92 9 0 89 8 6 91 9 62 101 22 7 650 10 85
trichlorofluoro- methane 65 13 2 90 9 0 88 10 8 80 9 63 99 28 9 860 16 146
diethyl ether 340 350 34 510 200 23 117 12 9 560 240 190 340 330 12 970 52 80
acetone 103 17 17 89 2 5 105 20 12 98 4 72 69 2 10 72 11 31
1,1-dichloroethene 75 27 2 91 3 0 87 9 7 83 12 63 450 520 38 148 16 22
iodomethane 85 6 1 94 5 0 112 7 4 104 16 61 104 15 4 106 3 7
allyl chloride 70 7 1 86 6 0 85 7 5 90 10 62 91 16 6 113 5 13
methylene chloride-d6 93 2 5 95 5 2 103 4 3 104 6 65 109 4 1 99 3 2
methylene chloride 91 3 6 96 5 2 100 5 3 106 5 64 106 2 1 106 4 2
acrylonitrile NAg 94 4 6 NA 108 5 70 110 7 17 74 5 34
trans-1,2- dichloro- ethene 81 9 1 101 8 0 94 4 3 107 10 61 101 17 4 118 7 8
1,1-dichloroethane 87 2 2 92 4 1 100 2 1 97 2 62 101 3 1 56 0 0
methacrylonitrile NA 94 3 5 NA 145 14 74 99 4 5 66 1 5
2-butanone 119 12 17 89 9 5 136 21 15 98 4 74 69 13 10 66 4 28
propionitrile NA 82 3 4 NA 92 2 70 113 4 16 60 2 23
2,2-dichloropropane 75 5 1 95 1 0 87 4 5 87 5 63 87 10 5 112 1 13
cis-1,2-dichloro- ethene 94 1 5 99 2 2 99 1 3 103 0 63 102 4 1 99 1 2
chloroform 98 2 7 101 2 3 99 1 4 102 2 64 104 3 1 97 0 2
isobutanol 134 10 25 97 8 6 128 7 17 95 5 68 85 13 13 NA
bromochloro-
methane		 101 2 6 102 0 2 102 1 3 107 2 67 103 1 2 95 1 2
1,1,1-trichloroethane 79 6 1 101 1 0 86 5 5 89 5 62 91 13 6 117 1 14
1,1-dichloropropene 65 7 3 98 2 2 79 5 6 83 5 60 91 19 7 120 2 17
carbon tetrachloride 75 8 2 107 4 0 84 7 7 89 6 62 93 20 8 121 2 18
benzene-d6 95 1 2 98 1 1 99 0 1 101 1 61 99 2 1 98 1 1
1,2-dichloroethane 104 2 7 101 1 2 102 1 4 106 0 68 101 2 2 93 1 3
benzene 85 2 2 99 1 1 95 0 1 102 1 61 98 1 2 99 1 1
trichloroethene 103 2 2 111 3 1 98 5 4 106 1 61 99 8 4 105 2 7
1,2-dichloro- propane-d6 98 2 6 98 1 2 99 2 3 99 1 64 100 1 1 97 1 2
1,2-dichloropropane 99 2 7 98 2 3 99 1 4 99 1 64 100 2 1 98 1 2
methyl methacrylate 64 1 8 66 1 4 62 3 5 67 5 84 53 3 3 69 2 6
bromodichloromethane 119 4 7 106 2 2 104 4 3 105 1 64 104 2 1 97 1 2
1,4-dioxane 86 4 9 91 1 4 94 4 8 97 1 67 104 6 13 81 1 19
dibromomethane 114 3 14 107 2 6 105 2 8 107 1 70 103 1 5 95 1 8
4-methyl-2-pentanone 82 3 11 80 1 5 97 3 8 89 5 72 82 2 4 68 2 6
trans-1,3- dichloropropene 111 1 9 101 1 3 105 1 5 101 0 63 102 1 2 99 1 2
toluene 77 5 5 101 0 3 92 1 4 101 1 59 98 1 2 104 1 1
pyridine 137 42 39 105 6 9 106 15 17 84 1 68 79 5 16 141 6 86
cis-1,3-dichloro-propene 126 4 10 110 2 3 108 4 5 107 1 66 100 1 3 98 1 3
N-nitrosodi-methylamine 93 11 12 147 10 8 110 5 10 184 38 65 113 13 6 510 30 42
1,1,2-trichloro-ethane-d3 111 3 15 105 3 6 98 3 8 100 4 70 93 2 5 98 1 8
2-hexanone 88 5 12 80 4 4 113 3 8 91 3 68 90 3 5 69 4 6
1,1,2-trichloroethane 120 3 16 107 2 6 106 4 9 104 2 68 101 0 5 97 1 8
tetrachloroethene 98 16 5 102 7 2 99 14 6 95 2 57 98 18 6 81 5 9
1,3-dichloropropane 103 1 14 101 1 6 99 1 8 99 1 67 99 1 5 97 1 8
dibromochloro-methane 128 3 11 109 2 3 109 4 5 105 0 63 100 1 3 97 1 3
2-picoline NA 141 10 6 NA 152 47 63 51 25 5 161 22 40
1,2-dibromoethane 93 1 12 96 1 5 91 2 7 93 1 65 97 1 5 92 0 8
chlorobenzene 100 3 9 104 1 4 97 1 5 103 1 56 99 1 2 96 1 2
1,1,1,2-tetrachloro-ethane 115 2 10 104 1 3 107 1 3 103 1 58 102 1 2 102 1 2
ethylbenzene 91 2 4 98 0 2 93 0 4 101 1 53 99 1 2 104 1 1
N-nitroso-methyl- ethylamine 102 13 25 119 8 6 104 4 11 109 16 55 104 7 14 350 14 120
m,p-xylenes 92 1 4 99 1 2 94 1 4 101 1 53 98 1 2 106 1 1
styrene 111 3 9 103 1 3 101 2 6 104 1 53 102 1 1 104 0 3
o-xylene 95 1 6 98 1 2 94 1 5 100 1 53 99 1 1 103 1 2
isopropylbenzene 80 3 4 99 2 1 87 2 5 102 1 51 97 3 3 115 1 5
bromoform 120 1 15 106 0 6 104 1 9 97 2 60 96 1 5 99 1 8
cis-1,4-dichloro-2-butene 103 4 13 94 4 5 104 5 10 87 1 60 91 1 5 86 1 7
N-nitrosodiethylamine 80 17 19 96 12 4 92 13 10 78 10 51 125 9 15 220 5 53
1,1,2,2-tetrachloro-ethane 120 5 15 107 2 6 108 4 10 100 1 61 92 2 5 99 2 8
4-bromo-1-fluoro-benzene 119 3 10 106 2 3 106 1 7 107 1 52 101 1 1 101 0 2
1,2,3-trichloro-propane 90 15 23 90 5 5 86 0 7 83 1 59 87 1 5 87 1 7
n-propylbenzene 94 11 19 100 3 1 93 6 5 105 0 50 99 5 4 118 1 7
trans-1,4-dichloro -2- butene 125 12 31 97 4 5 107 0 9 88 2 59 92 1 5 84 1 7
1,3,5-trimethyl-benzene 103 11 21 97 1 1 102 4 4 108 2 49 102 3 3 110 1 2
bromobenzene 126 12 28 103 1 3 106 2 5 102 0 52 102 2 2 98 0 2
2- chlorotoluene 117 12 24 102 1 1 108 6 4 111 3 50 107 2 3 106 1 1
4-chlorotoluene 121 13 25 102 3 2 106 4 4 107 1 49 102 3 3 105 1 2
pentachloroethane 138 19 30 114 2 3 121 8 6 116 4 53 105 3 3 138 8 3
tert-butulbenzene 92 10 19 97 2 2 90 4 5 101 1 48 98 4 4 120 2 6
1,2,4-trimethyl-benzene 103 10 22 96 1 2 99 3 5 104 2 48 101 1 3 110 1 3
sec-butylbenzene 89 12 19 101 4 2 91 8 6 107 3 49 99 7 6 121 2 11
aniline 210 64 113 94 14 9 116 10 33 70 14 52 129 19 31 680 36 450
p-isopropyl toluene 95 18 41 96 2 3 95 12 24 99 3 47 94 3 8 115 2 9
1,3-dichlorobenzene 139 17 31 106 3 3 116 6 7 114 1 49 103 3 4 100 1 4
1,4-dichorobenzene 140 17 32 106 2 4 115 5 8 111 1 50 102 3 4 100 1 4
n-butylbenzene 102 20 44 103 5 3 106 16 28 112 5 48 94 6 8 120 2 12
1,2-dichlorobenzene 141 17 34 105 2 4 115 6 9 108 0 49 101 2 4 97 1 5
benzyl alcohol 142 55 67 102 6 8 84 12 27 78 18 50 97 10 19 460 19 200
N-nitrosodi-n- propylamine 115 36 55 83 11 6 108 27 34 54 8 49 106 16 17 93 3 33
acetophenone-d5 153 33 74 96 9 8 118 18 37 60 4 49 78 3 15 37 1 17
o-toluidine 330 130 190 85 15 9 100 2 33 58 15 50 114 19 29 530 29 380
1,2-dibromo-3- chloropropane 154 25 69 96 6 7 101 5 28 70 5 52 79 3 8 54 1 7
hexachlorobutadiene 64 7 63 113 4 18 90 3 49 124 18 58 104 13 10 133 3 14
1,2,4-trichloro-benzene 120 26 108 114 2 17 116 5 56 123 2 58 104 4 9 96 1 7
naphthalene-d8 114 23 129 114 6 22 94 6 58 92 4 58 96 4 9 71 1 6
naphthalene 96 14 119 113 5 24 91 8 60 92 2 59 97 3 9 76 1 7
1,2,3-trichloro-benzene 125 27 156 120 0 26 124 6 84 130 4 67 107 3 9 90 1 8
N-nitroso dibutylamine 440 250 330 75 17 25 320 160 210 66 22 65 250 61 89 900 62 920
2-methy naphthalene 1000 750 580 168 13 57 580 330 320 167 1 101 121 16 25 162 8 75

a Three replicate analyses were performed for both the water and vacuum spike.
b Three replicate analyses were performed for both the water and vacuum spike.
c Seven-replicate water spikes and three-replicate vacuum spikes were performed.
d Average of replicate accuracy results using surrogate corrections.
e Standard deviation (1 sigma) of replicate analyses.
f Average variation between predictions of the surrogate pairs for the replicate analyses.
g Analyte not significantly present in vacuum distillate

 

 


 

National Exposure Research Laboratory
Author:  Mike Hiatt
Email:  Hiatt.Mike@epa.gov or Pia.Stephen@epa.gov
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