Other Element Selective Detectors

A number of organometallic compounds such as those of tin, lead, arsenic and mercury are readily separated by GC and many more as chelate derivatives. Even such an unlikely element as iron can be dealt with as the volatile chloride, FeCl3, although there are many better methods for such an analysis. For organometallic compounds, atomic absorption and emission spectrometers (AAS and AES), have been used with considerable success. In view of the fact that the vapour emerging from a GC column would appear to be in an ideal state for presentation

1} Oxygen

2) Acetone

3) Ethyl acetate

4) Methyl alcohol

5) Isopropyl alcohol

6) Ethyl alcohol

3 7| sec-Butyl alcohol

6 8) 1-Propanol

9} Water

Figure 4 Detection of oxygenates in gasoline at 200 ppm level. (From Sironi, A and Verga, GR. In Chromatography in the Petroleum Industry (1995) Adlard, ER (ed.). Reproduced with permission of Elsevier Science Publishers.)

Figure 4 Detection of oxygenates in gasoline at 200 ppm level. (From Sironi, A and Verga, GR. In Chromatography in the Petroleum Industry (1995) Adlard, ER (ed.). Reproduced with permission of Elsevier Science Publishers.)

to an AAS it is a little surprising that the technique has not been used more frequently. It has the virtues of high sensitivity for many metals and high selectivity. It also gives information about the speciation of the organometallics which is very difficult to obtain in other ways.

In spite of these advantages relatively little has been published on the use of such detection systems, probably reflecting the relatively minor importance of the analysis of organometallics compared to ordinary organic compounds. Organometallics are, however, important in a number of fields, e.g. the determination of butyltin antifouling paint residues in the environment, and it seems likely that this niche area will remain but not expand significantly in the future.

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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