219
Index
Equation
Interpreted criteria
References
GWCP
(groundwater contamination
potential)
GWCP
PLP CLP
=
+
2
>150, high;
75–150, moderate;
<75, low
McLaughlin
et al. (1994)
AFT (log-transformed attenuation
factor)
AFR(revised attenuation factor)
AFT = In AF/(−0.693)
AFR = In AFT + k
Lower values mean lower leaching potential Li
et al. (1998)
RLP
(relative leaching potential index)
RLP
=
⋅
K
DT
oc
50
10
Higher values mean lower leaching potential Warren and Weber
(1994)
LIX
(screening leachability index)
LIX
=
−
⋅
exp
.
0 693
50
K
DT
DC
1, high leachable;
0.1–1, leachable;
0–0.1, transition;
0, nonleachable
Spadotto
(2002)
LIN
(leaching index)
LIN = 0.495 log Kow + 0.518
log Sw− 0.495 log Koc
− 0.023 log Vp − 0.452 log K H
Lower values mean lower leaching potential Gramatica and Di
Guardo
(2002)
M. LEACH
(modified LEACH)
M LEACH
.
/
=
⋅
Sw t
Koc
1 2
Lower values mean lower leaching potential Papa
et al. (2004)
GLI (global leachability index)
GLI = 0.579 LIN + 0.558 GUS +
0.595 M. LEACH
>1, high;
−0.5 to 1, medium;
<
−0.5, low
Papa
et al. (2004)
DTK (depth, t
1/2
, K
OC model)
DTK
depth
=
⋅ ⋅
− ⋅ ⋅
(
)
−
e
a In t
b In Koc
1 2
/
>0 potential leacher;
≤0 nonleacher
Webb
et al. (2008)
VI
(volatility index)
VI
=
⋅ ⋅
⋅ ⋅(
)
⋅
⋅
200
1 2
k
d Pb
OM
t
Koc
F
FC
DGW
θ
%
/
Lower values mean lower leaching potential Gurdak
(2014)
YASGEP-P
YASGEP-P = (0.892) GUS + (0.709) LIX +
(0.926) M.LEACH + (0.805) LIN + (0.749)
Briggs’s RF + (0.844) Hamaker’s
RF + (0.910) PLP + (−0.860) AFR
Lower values mean lower leaching potential Akay Demir
et al. (2019)
t
1/2 half-life (days),
Ɵ volumetric soil water content, Z or d
depth to groundwater (m), q
net groundwater recharge rate (m/day),
ρ b soil bulk density (kg/m
3
),
OM
organic matter, S
w water solubility (mg/l), V
P vapor pressure (mm Hg),
Ɵ FC volumetric water content at field capacity, F
fraction of pesticide reaching the
soil during application, K
H Henry constant, K
ow octanol/water partition coefficient, K
oc organic carbon normalized soil sorption coefficient (ml/g organic carbon), RF
retardation factor, V
volatility (bar), f
oc organic carbon fraction, R
rate of pesticide application (kg/ha)
7 Improving Quantitative Analysis of GC-MS for Tracking Potential Contaminants…
Index
Equation
Interpreted criteria
References
GWCP
(groundwater contamination
potential)
GWCP
PLP CLP
=
+
2
>150, high;
75–150, moderate;
<75, low
McLaughlin
et al. (1994)
AFT (log-transformed attenuation
factor)
AFR(revised attenuation factor)
AFT = In AF/(−0.693)
AFR = In AFT + k
Lower values mean lower leaching potential Li
et al. (1998)
RLP
(relative leaching potential index)
RLP
=
⋅
K
DT
oc
50
10
Higher values mean lower leaching potential Warren and Weber
(1994)
LIX
(screening leachability index)
LIX
=
−
⋅
exp
.
0 693
50
K
DT
DC
1, high leachable;
0.1–1, leachable;
0–0.1, transition;
0, nonleachable
Spadotto
(2002)
LIN
(leaching index)
LIN = 0.495 log Kow + 0.518
log Sw− 0.495 log Koc
− 0.023 log Vp − 0.452 log K H
Lower values mean lower leaching potential Gramatica and Di
Guardo
(2002)
M. LEACH
(modified LEACH)
M LEACH
.
/
=
⋅
Sw t
Koc
1 2
Lower values mean lower leaching potential Papa
et al. (2004)
GLI (global leachability index)
GLI = 0.579 LIN + 0.558 GUS +
0.595 M. LEACH
>1, high;
−0.5 to 1, medium;
<
−0.5, low
Papa
et al. (2004)
DTK (depth, t
1/2
, K
OC model)
DTK
depth
=
⋅ ⋅
− ⋅ ⋅
(
)
−
e
a In t
b In Koc
1 2
/
>0 potential leacher;
≤0 nonleacher
Webb
et al. (2008)
VI
(volatility index)
VI
=
⋅ ⋅
⋅ ⋅(
)
⋅
⋅
200
1 2
k
d Pb
OM
t
Koc
F
FC
DGW
θ
%
/
Lower values mean lower leaching potential Gurdak
(2014)
YASGEP-P
YASGEP-P = (0.892) GUS + (0.709) LIX +
(0.926) M.LEACH + (0.805) LIN + (0.749)
Briggs’s RF + (0.844) Hamaker’s
RF + (0.910) PLP + (−0.860) AFR
Lower values mean lower leaching potential Akay Demir
et al. (2019)
t
1/2 half-life (days),
Ɵ volumetric soil water content, Z or d
depth to groundwater (m), q
net groundwater recharge rate (m/day),
ρ b soil bulk density (kg/m
3
),
OM
organic matter, S
w water solubility (mg/l), V
P vapor pressure (mm Hg),
Ɵ FC volumetric water content at field capacity, F
fraction of pesticide reaching the
soil during application, K
H Henry constant, K
ow octanol/water partition coefficient, K
oc organic carbon normalized soil sorption coefficient (ml/g organic carbon), RF
retardation factor, V
volatility (bar), f
oc organic carbon fraction, R
rate of pesticide application (kg/ha)
7 Improving Quantitative Analysis of GC-MS for Tracking Potential Contaminants…