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Chromatographic scince series - Cazes J.

Cazes J. Chromatographic scince series - Marcel Dekker, 1996. - 1098 p.
ISBN 0-8247-9454-0
Download (direct link): ˝hromatography1996.pdf
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(2) Toluene-ether-acetic acid
(75:25: 1)
(3) Butanol-acetic acid-water
(6:1:1)
(1) Hexane-acetone-acetic acid
(25:25:1)
(2) Toluene-ether-acetic acid
(75:25: 1)
(Baker)
Alumina G impregnated with AgNO,
(1) Hexane-benzene (45:55)
(2) Hexane-CHCI, (60:40)
(3) Hexane
17 other solvent systems
(1)
82
(1-Ó)
l4C-fenvalerate (a) Silica gel 60 (1) Toluene-ether-acetic acid 74
4' -HO-fenvalerate F 254 (75:25:1) 50
metabolites (2) Hexane-acetone-acetic acid
(25:25: 1)
(3) Hexane-toluene-acetic acid
(3:15:2)
(b) Si-ClsF (4) Methanol: water (8: 2)
(I)
86
79
64
56
60
52
R, x 100 Detect ion Sample Ref.
(2) (3)
68 74 Cotton callus 118
tissues
(I) (2)
78 72 Rat 119
(2-Ó) (3 - a) (4 - b)
75 62 10 Autorad. Quail 120
65 34 13 UV Rat tissues
(2) (3)
87 Ś AgNO, Tomato plant 121
82 Ś Tomato fruit
57 Ś
49
53 Soil
45 Ś 121
790 Fodor-Csorba
a-HCH
/3-═Đ═
y-HCH
8-HCH
pp'-DDE ppĺ-DDD op'-DDT pp'-DDT l4C-ci.s-permcthrin l4C-rrani-permethrin degradation products
l4C-fenvalerate
metabolites
C-resmethrin
cis-resmethrin
/ran.t-resmethrin
metabolites
l4C-fenpropathrin
metabolites
Silica gel 60 F254 (Brinkman)
Silica gel 60 F254 (EM Lab.)
Silica gel F254 (Brinkman)
Kieselgel 60 F2: (Merck)
(1) Benzene saturated with
formic acid-ether (10:3)
(2) Hexane-benzene-acetone
(7 :3 :0.1)
3 x development
(1) Hexane-toluene-acetic
acid (3:15: 2)
(2) Toluene-ether-acetic
acid (75 : 25 : 2)
(1) Benzene saturated with
formic acid-THF (10: I), 3 x development
(2) Benzene saturated with
formic acid-ether (10:3)
(1) Hexane-toluene-acetic acid
(3:15:2)
(2) Hexane-acetone (4:1).
2 x development
(3) Toluene-ethyl formate-formic acid (5:7:1)
90 88 28
68 63 06
80 73 18
48 40 03
Incomplete resolution
65
18
56
43
59
63
67
57
Autorad.
Soil
Water
123
77
86
Autorad.
Colorado potato beetles
122
85
80
85 80
57 57 89
Autorad.
Lactating Jersey cows Excreta Blood Milk
Other tissues
124
Autorad. UV 5% ninhydrin in 1-BuOH Ferric nitrate in HNO, 5% AgN03 in NH4OH 2% Triphe-nyl-tctrazolium chloride
in 1 N NaOH-MeOH
125
Pesticides 791
792
Fodor-Csorba
Further isomer separation was achieved on a second plate developed with a hexane-ether (4:1) mixture after three developments in the same direction.
In addition to the photoisomerization of deltamethrin, its metabolic pathway was also studied by means of TLC. 14C-deltamethrin labeled on the acid or benzyl part of the molecule was used in metabolism studies on eggs, yolks, and albumen or liver and kidney samples of laying hens (113) and on enzyme preparations of cow and chicken livers (114) (Table 9). The main metabolites were assigned and characterized by the /fy-values given in Table 9.
Fenvalerate (XXI, Fig. 7) (Pydrin, Sumicidin, Belmark) is an effective broad-spectrum synthetic pyrethroid insecticide. Fenvalerate exhibits improved photolytic stability and extended field residual activity compared to other pyrethroids. The most insecticidally active stereoisomer is of the
2S,aS[S,S] configuration. The racemic mixture and the pure effective insecticide were investigated
(115). The residual activity of the racemic mixture and the most insecticidally active stereoisomers [S,S] were investigated on soil samples. Before application the isomer separation of the 14C-fenvaler-ate was carried out by six consecutive developments in hexane-ether (20:1). The [S,S] and [R,R] isomers were located at ╦/0.46 and the [R,S] and [S,R] stereoisomers at /fy0.49 (Table 9). The isomer pairs were finally resolved in HPLC using a chiral stationary phase. Soil extracts were analyzed in order to investigate the degradation processes and persistence of 14C-fenvalerate (Table 9) (115). The parent compound and its degradation products were separated by two-dimensional TLC (Table 9)
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