By Prof. Dr. H.-J. Stan (auth.), Prof. Dr. H.-J. Stan, Dir. u. Prof. Dr. W. Ebing i.R., Prof. Dr. H. Börner, Prof. Dr. D. Martin, Dr. V. Sjut, Prof. Dr. J. Stetter (eds.)
Public predicament is being more and more directed to insecticides and their residues in flooring and floor waters. Water - one of many must haves of existence - should be saved fresh for guy and the surroundings. half I and II of this publication describe in an authoritative approach all points of contemporary research of insecticides in water via the resultant use of hyphenated concepts like GC-AED or HPLC-MS.
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Additional info for Analysis of Pesticides in Ground and Surface Water I: Progress in Basic Multi-Residue Methods
G. alternative evaporation steps, are exemplified by ftow charts for the analytical procedures given in Refs.  (LLE) and  (SPE), see Figs. 1 and 2. Some relevant extraction procedures are summarized in Table 1 and 2. Poole et al  produced an excellent review on sam pie preparation, including extraction and cleanup, both in general and in depth. For overall information on the properties of extraction columns, liquid-liquid extraction devices, and so forth, this review is recommended. It is a general review, not dedicated to pesticides.
The sampie, which may be fortified with sodium chloride and/or L% methanol, is then forced through at a speed of 5-10 mlmin- 1 . The column is dried with pure nitrogen for 15 min to 2 h depending on SPE column used and the need for dry extract in the final determination. The pesticides are eluted, drop by drop, with 3-4 ml of acetone or methanol. The eluate is concentrated to a suitable volume in a test tube as above. It is strongly advised that Sect. 2 (General Considerations) should be read before setting up any method.
The device has recently become commercially available. Other approaches include the applicati on of passive dosimetry in water , and the extraction of a water sampie with the stationary phase in a capillary column through which the sampie is forced, and which is subsequently put into agas chromatograph . 5 On-Site Extraction The transport of water sampies is often troublesome. It also limits sampie volumes, and involves the risk of degradation of the pesticides and adsorption of hydrophobie pesticides onto the sampie vessels.
Analysis of Pesticides in Ground and Surface Water I: Progress in Basic Multi-Residue Methods by Prof. Dr. H.-J. Stan (auth.), Prof. Dr. H.-J. Stan, Dir. u. Prof. Dr. W. Ebing i.R., Prof. Dr. H. Börner, Prof. Dr. D. Martin, Dr. V. Sjut, Prof. Dr. J. Stetter (eds.)