Experimental Work 1

Materials used for the experiments (composition - composting) and characteristics:

 

Compost materialOrg. C (% dw)total Ν(% dw)C/NpH
Olivetree pruning43,252,2719,057,48
Grapevine pruning48,792,3320,937,18
Grapes52.452,7120,137.34
Pomaces49,852,2522,157,70

 

Experimental Pre-work

Pesticide recovery levels in biomixtures in a solvent system of cyclohexane/acid ethylester/acetone (30:40:30).

 

DeltamethrinCypermethrinChlorpyrifos
Level Standard (μg/g)% recoveryRSD*% recoveryRSD*% recoveryRSD*
0.0175.2312.377.1214.2389.237.52
0.0578.288.9881.909.8790.125.67
0.193.454.5688.875.6392.816.78
0.594.123.4591.926.1292.347.81
199.712.9897.124.5695.7111.29
2102.9812.8294.126.7898.784.91
*Relevant Typical Deviation.

 

Comparative Results with several solvents

Comparative results of several solvent systems for extracting several pesticides in external standard level of 0.1μg/g biomixure.

 

DeltamethrinCypermethrinChlorpyrifos
Solvents% recoveryRSD*% recoveryRSD% recoveryRSD
147.98a**12.9861.92a7.9037.98a7.91
281.81c6.7879.09b6.9180.89c4.91
360.29b10.8258.81a2.8362.98b5.71
493.61d7.8188.87c5.6392.81d7.81

 

1. Methanol/Water (80:20)
2. Acid ethyl ester/acetone (70:30)
3. Acid ethyl ester
4. Cyclohexane/acid ethylester/acetone (30:40:30)
* Relevant Typical Deviation
** Different letters indicate significant differences among average retrievals of several pesticides in level (a=0.05) according to Turkey HSD criterion.