Most of the organic pollutants to be determined in environmental analysis are extracted from matrices like water or soil samples by means of solvents. The composition of the analytes is quantitatively analysed after a concentration step. In order to get meaningful results it is essential that for the used solvents extremely low limits referring to the substances to be analysed are guaranteed.
The PESTANAL® solvents were developed especially for the application in residue analysis of pesticides and other low-volatile, environmentally relevant substances by means of GC/ECD or GC/PND. As polychlorinated biphenyles (PCBs) are also detected in the GC/ECD test, the PESTANAL® solvents are suitable for analysis of this class of substances as well.
Besides a general high grade of purity the specifications are tailor-made to the special requirements in residue analysis of pesticides, metabolites, preservatives and other low-volatile, environmentally relevant substances. Therefore, the specification refers mainly to the corresponding retention ranges for GC/ECD and GC/PND analyses.
Moreover, besides their suitability for residue analysis by means of GC/ECD and GC/PND, parameters as assay, non-volatile matter and water content are specified for each solvent. As these values might vary depending on the solvent, they are indicated in the product range see back page.
The high purity solvents are produced in a plant using cutting-edge technology. They are produced in large, homogenous lots involving several purification steps. Filling occurs under clean-room conditions in contaminant-free, functional packaging materials.
In addition to the 1 l and 2.5 l glass bottles the solvents of the PESTANAL® line are also available in returnable packagings as the 7 l stainless steel bottle and the 18 l and 45 l stainless steel barrels.
Table 1. Specifications
| Method |
GC/ECD |
GC/PND |
| Retention range |
Pentachlorobenzene to DDT |
4-Chloraniline to Coumaphos |
| single signals |
max. 5 pg/ml |
max. 5 pg/ml |
| Standards |
Pentachlorobenzene, Lindan, Heptachlor, Aldrin, 4,44-DDD, 4,44-DDT |
4-Chloraniline, Parathionethyl, Altrazin, Coumaphos |
Table 2. Specification / Product Range
| Catalog No. |
Product Name |
Assay (GC) (%) |
Non-volatile matter (%) |
Water (Karl Fischer) (%) |
Package Size1) |
| 34480 |
Acetone |
min. 99.8 |
max. 0.0005 |
max. 0.2 |
1 l, 2.5 l, 7 l, 45 l |
| 34481 |
Acetonitrile |
min. 99.9 |
max. 0.0005 |
max. 0.05 |
1 l, 2.5 l, 7 l |
| 34498 |
tert.-Butylmethylether |
min. 99.7 |
max. 0.0005 |
max. 0.05 |
1 l, 2.5 l |
| 34496 |
Cyclohexane |
min. 99.5 |
max. 0.001 |
max. 0.01 |
1 l, 2.5 l, 7 l |
| 34488 |
Dichlormethane |
min. 99.8 |
max. 0.0005 |
max. 0.02 |
1 l, 2.5 l, 7 l, 45 l |
| 34489 |
N,N-Dimethylformamide |
min. 99.8 |
max. 0.001 |
max. 0.08 |
1 l, 2.5 l |
| 34490 |
Ethyl acetate |
min. 99.9 |
max. 0.0005 |
max. 0.02 |
1 l, 2.5 l, 7 l, 45 l |
| 34495 |
n-Heptane |
min. 99.0 |
max. 0.0005 |
max. 0.01 |
1 l, 2.5 l, 7 l |
| 34493 |
iso-Hexane |
min. 85.0 |
max. 0.0005 |
max. 0.01 |
1 l, 2,5 l |
| 34484 |
n-Hexane |
min. 95.0 |
max. 0.0005 |
max. 0.01 |
1 l, 2.5 l, 7 l, 18 l, 45 l |
| 34485 |
Methanol |
min. 99.9 |
max. 0.0005 |
max. 0.05 |
1 l, 2.5 l, 7 l |
| 34499 |
iso-Octane |
min. 99.0 |
max. 0.0005 |
max. 0.01 |
1 l, 2.5 l |
| 34497 |
n-Pentane |
min. 99.0 |
max. 0.0005 |
max. 0.01 |
1 l |
| 34491 |
Petroleum benzine 40-600C |
- |
max. 0.0005 |
max. 0.01 |
1 l, 2.5 l, 7 l, 45 l |
| 34486 |
2-Propanol |
min. 99.8 |
max. 0.0005 |
max. 0.1 |
1 l, 2.5 l |
| 34492 |
Propylene carbonate |
note: 3) |
note: 4) |
- |
1 l |
| 34494 |
Toluene |
min. 99.7 |
max. 0.0005 |
max. 0.02 |
1 l, 2.5 l, 7 l, 45 l |
| 34487 |
Trichloromethane |
Min. 99.0 |
max. 0.0005 |
max. 0.01 |
1 l, 2.5 l |
| 34478 |
Water |
- |
max. 0.0005 |
- |
1 l |
|
