Area response discrepancies

Procedure. Inject 1 fiL of the sample solution and obtain a chromatogram. Under the above conditions the compounds are separated in about 3 minutes, the elution sequence being (1) aspirin (2) phenacetin (3) caffeine. Measure peak areas with an integrator and normalise the peak area for each compound (i.e. express each peak area as a percentage of the total peak area). Compare these results with the known composition of the mixture discrepancies arise because of different detector response to the same amount of each substance. 

A central EEC registration authority (European Agency for the Evaluation of Medicinal Products) will be established and "shall take up its responsibilities on 1 January 1995 (Council Directive 2309/93 of 22 July 1993). The Committee on Proprietary Medicinal Products, CPMP, which consists of members of the Commission and from the states authorities, plays a central role in the existing and future system. It is assisted by different working parties for specific areas. The CPMP coordinates the procedures, assesses applications and provides "opinion reports" and acts as arbitrator in the case of national discrepancies. However, the opinion reports and decisions of the CPMP are not (yet) binding to the member states. For veterinary products identical rules apply here a CVMP acts as the central body. 

The above discrepancies seem to be due mainly to the stringencies of the end-points in each test. However, one can also doubt the applicability of these tests for cannabinoids. These tests were developed for opiates and may not necessarily parallel and be fully relevant to THC activity in man. Indeed, recent work on electrodes implanted into several distinct brain areas of the rat led to the conclusion that the apparent analgesia produced by the cannabinoids is more related to their disruption of discharge in response to some synthetic impact rather than to a depression of pain pathways [130]. The question whether cannabinoids cause analgesia by interference with pain reception or with pain perception is still unresolved. 

First, there would appear to be an apparent discrepancy in the fact that since 1974 acidity of rain in these areas has not increased (indeed sulphur emissions in Western Europe have fallen), but the trend to loss in fish populations in Scandinavia and Scotland has on the whole continued. This, on the face of it, can be explained by a continued leaching out of base cations and loss of buffering capacity from the top soils through which most of the run-off occurs, and the slow response time of fish populations in lakes to loss of spawning trout in tributory streams. However, at the same time an explanation must also be found for the following ... 

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