50000
45000
40000
35000
30000
25000
20000
15000
10000
5000
2500
33.20 33.30
33.40 33.50
33.60 33.70 33.80 33.90
34.00 34.10 34.20
Time (min)
Time (min)
Abundance
Abundance
a
27%
26%
47%
49%
6%
45%
Trans 2
Trans 1
Cis1
Trans 1
Cis 2
Trans 2
b
50000
40000
30000
20000
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
33.20 33.30 33.40 33.50 33.60 33.70 33.80 33.90 34.00 34.10 34.20
Cis 2
Cis 1
Fig. 7
(a) Cypermethrin isomeric profile and percentage found in a commercial racemic formulation; (b) profile and isomeric percentage in an egg sample after
topical application of the formulation in hens. Analysis by gas chromatography-mass spectrometry in negative chemical ionization mode [93]
168
C. E. T. Parente et al.
45000
40000
35000
30000
25000
20000
15000
10000
5000
2500
33.20 33.30
33.40 33.50
33.60 33.70 33.80 33.90
34.00 34.10 34.20
Time (min)
Time (min)
Abundance
Abundance
a
27%
26%
47%
49%
6%
45%
Trans 2
Trans 1
Cis1
Trans 1
Cis 2
Trans 2
b
50000
40000
30000
20000
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
33.20 33.30 33.40 33.50 33.60 33.70 33.80 33.90 34.00 34.10 34.20
Cis 2
Cis 1
Fig. 7
(a) Cypermethrin isomeric profile and percentage found in a commercial racemic formulation; (b) profile and isomeric percentage in an egg sample after
topical application of the formulation in hens. Analysis by gas chromatography-mass spectrometry in negative chemical ionization mode [93]
168
C. E. T. Parente et al.