Lindane recovery rates

Table 9-4 shows the solvent and the amount of solvent used in the extraction, the concentration of lindane and the resulting recovery rates. 

Table 9-4 shows that the recovery rate is dependent both on the solvent and on the amount of solvent used. For a low concentration, in our example 10 pg lindane/3 ml blood, 15 ml solvent is quite sufficient. However, if 100 pg lindane is present, the resulting recovery rate is poorer, and a larger amount of solvent is therefore used. As the concentration is unknown in real samples, 30 ml solvent should always be used in order to be able to reproducibly determine higher concentrations also. 

Figure 9-3 shows the calibration line of lindane. This line was used to determine the recovery rates. For this, the peak area of a standard was determined. The standard was then added in known concentration to a sample of pooled blood and the sample preparation method described above was applied. The recovery rate can be found from the peak area of the standard and that of the blood with the added standard. Each calibration point shown in Fig. 9-3 represents the mean of five individual measurements from the matrix blood. 

Figure 9-8 shows the calibration curve for PCP which was used to determine the recovery rates. This curve was obtained by a method analogous to that used to produce the curve for lindane. 

---

See also in sourсe #XX -- [ ]

---