18 2
2 0 1 2 0 6 ANALYSIS AND TESTING TECHNOLOGY AND INSTRUMENTS
Volume 18 Number 2
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June 2012
111 113
2012 05 02 2012 05 23
1980 miaojianjun1998@ 126 com
/
1 2
1 226006 2 210032
/
α
β
0 200 10 0
μ
g /L 0 020 02 0 03
μ
g /kg
RSD 3. 6% 4 3% 83 6% 86 4%
α
β
/
O657 33 B 1006-3757 2012 02-0111-03
α
β
2 1
1
/ GC /EC D /
GC /MS EI
2 7
ECD
GC /MS EI
1
α
β
Fig. 1 Structural formulas of
α
endosulfan
and
β
endosulfan
1
μ
g /L
/ GC /MS NCI
100
1 000
8
/
1
1 1
ASE350
GPC LCTech
GC 6890 MS 5973 /
100 mg / L
α
β
1 2
1 2 1 ASE
150
μ
m
30 g
34 mL ASE
18
50 mL
ASE 1500 psi
100 5 min 5 min
50% 1 / V / V = 1 1
1 2 2 GPC
ASE
6 mL GPC
GPC 400 mm × 25 mm Bio Beads
SX 3 5 mL
5 mL/ min 1200 s 1900 s
5 mL 1 5 mL GC / MS
1 3 GC /MS
DB 5MS 30 m × 0 25 mm ×
1 0
μ
m 110 30 / min
260 10 /min 300
3 min 250 280
1
μ
L.
280 4 min.
SIM
1
1
Table 1 Target ions of analytes
CAS
α
959 98 8 406 408 404 372
β
33213 65 9 406 408 404 372
1031 07 8 386 384 352
2
2 1
1 00
μ
g /L SIM
2 8 min
2
Fig. 2 Chromatogram of endosulfan and Endosulfan
sulfate standards
2 2
α
β
0 20 51 02 05 010 0
μ
g /L
2
2 3
5 0
μ
g /kg ASE GPC
5
2 R 83 6%
86 4% RSD 3 6% 4 3%
2 4
0 5
μ
g /kg
5
MDL 5
S 3
2 0 1
μ
g /L ECD
9
2
Table 2 Standard curves method detection limits precisions and spike recovery test results
r
5 0
μ
g /kg
1 2 3 4 5 R /% RSD/%
MDL
/
μ
g /kg
α
y = 1 29 × 10
3
x 16
0 999 7 4 33 4 31 3 93 4 15 4 33 84 2 4 1 0 02
β
y = 1 54 × 10
3
x 38
0 999 5 4 45 4 26 4 02 4 15 4 02 83 6 4 3 0 02
y = 1 13 × 10
3
x 5
0 998 8 4 54 4 42 4 18 4 27 4 20 86 4 3 6 0 03
211
2 /
2 5
2
30g ASE
GPC 1 0 mL GC /MS
5
μ
g /L
3
MS
84%
3
Table 3 Detection results of real soil samples
1
ρ
/
μ
g /L
ρ
/
μ
g /L /%
2
ρ
/
μ
g /L
ρ
/
μ
g /L /%
α
3 62 7 93 86. 2 2 42 6 65 84 6
β
1. 45 5 69 84. 7 1 57 5 83 85 2
2 84 7 23 87 8 1 98 6 40 88 3
3
/
1
J 1996 4 1 41 49
2
J
2010 29 2 19 22
3 GC/ MS
J 2003 24 123 124.
4 GC /MS
16 J
2010 22 6 51 54
5
J 2009
21 6 39 43
6
J 2004 23
4 168 172
7
J 2009 48 7 515 518
8
J 2010 29 3 376 382
9
J 2007 24 6
1084 1089
Determination of Endosulfan and Its Metabolite in Soil Using Gas
Chromatography mass Spectrometry with Negative Ion Chemical Ionization
MIAO Jian jun
1
WANG Yan guang
2
1 Environmental Monitoring Center of Nantong Nantong 226006 China 2 Jinling High School Nanjing 210008 China
Abstract A gas chromatography negative ion chemical ionization mass spectrometry GC /MS NCI was developed for the rapid
determination of endosulfans and its metabolite in soil samples. The soil sample was pretreated with n hexane and then analyzed by
GC / MS NCI External standard calibration was used the selective ions of endosulfan and endosulfan sulfate were m / z 406 408
404 372 and m /z 386 384 352 respectively. The detection limit was 0 02 0 03
μ
g /kg. The recoveries were in the range of 83
6% 86 4% with the relative standard deviations less than 5% The method proposed is efficient accurate and sensitive which
could meet the requirements for determining endosulfans in soil.
Key words
α
endosulfan
β
endosulfan endosulfan sulfate gas chromatography negative ion chemical ionization mass
spectrometry GC / MS NCI soil
Classifying number
O657 33
311