Determination of Pesticide Residue in Brinjal Sample Using HPTLC and Developing a Cost-Effective Method Alternative to HPLC

Table 2

Pesticide residue found in brinjal samples by different HPTLC methods.

Pesticide

Sample number

1 (mg·kg^−1)

2 (mg·kg^−1)

3 (mg·kg^−1)

4 (mg·kg^−1)

5 (mg·kg^−1)

6 (mg·kg^−1)

7 (mg·kg^−1)

8 (mg·kg^−1)

9 (mg·kg^−1)

10 (mg·kg^−1)

Rf

MDQ (ng)

α-Endosulfan

ND

0.075^E

ND

0.105^D

0.22^A

ND

0.075^E

ND

0.155^C

0.2^B

0.67

50

Chlorpyriphos

0.055^G

ND

0.075^F

0.085^E

0.105^C

0.095^D

ND

0.099^CD

0.135^B

0.145^A

0.669

0.5

Methamidophos

0.025^F

0.035^E

0.065^D

ND

0.035^E

0.15^A

0.06^D

0.075^C

ND

0.085^B

0.11

10

Monocrotophos

0.135^C

0.165^A

ND

0.095^F

0.12^D

0.105^E

0.15^B

ND

0.09^F

0.125^D

0.08

88

Dichlorvos

ND

0.025^D

0.022^D

0.035^C

ND

ND

0.035^C

0.062^A

0.055^B

ND

0.504

10

Profenophos

0.078^C

0.062^E

ND

0.058^E

0.098^A

0.068^D

0.098^A

ND

0.048^F

0.088^B

0.34

20

Dimethoate

0.125^A

.D

0.075^D

0.105^C

0.125^A

0.105^C

ND

0.065^E

0.055^F

0.12^B

0.64

25

Carbosulfan

0.1^B

0.062^C

0.09^B

0.05^C

0.115^A

0.114^A

0.12^A

0.095^B

0.055^C

0.125^A

0.676

15

Deltamethrin

0.095^C

0.09^D

0.06^I

0.12^B

0.085^E

0.08^F

0.125^A

0.065^H

0.1^C

0.075^G

0.226

50

β-Cyhalothrin

0.125^C

0.15^B

0.25^A

0.115^C

ND

0.12^C

0.16^B

0.15^B

0.125^C

ND

0.55

100

Cypermethrin

0.125^F

ND

0.2^B

0.135^E

0.145^D

0.135^E

ND

0.205^A

0.145^D

0.165^C

0.673

100

Values are mean of 3 samples from each interval and 1–10 are sampling intervals. ND: not detected. Capital letters as subscript on values means separation.