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Drugs and medicines explored

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Introduction

DRUGS AND MEDICINES: EXPLORED BY LAURA GILCHRIST The difference between Medicines and Drugs People often get confused between the definition of a drug, and that of a medicine. There is a distinct difference- a drug is something which the doctor prescribes, whereas a medicine is what you as a patient can purchase from the chemist. It is an overall name given to the mixture, which consists of the active drug which the doctor prescribed, and any other substances such as sugar and gelatine. Contrary to what many people believe, medicine does not just come liquidised in a bottle- it can come in all shapes and sizes, in the form of tablets, capsules and even injections. ORGANIC CHEMISTRY LIQUID-GAS CHROMATOGRAPHY Gas/liquid chromatography is used to separate and identify very small samples of gases, liquids or volatile solids. ...read more.

Middle

Each peak identifies a different component in the mixture being separated. Gas/liquid chromatography is used by the police and forensic scientists, to detect small quantities of organic compounds, and can be very useful in day to day life. Instrumental components Carrier gas The carrier gas must be chemically inert. Commonly used gases include nitrogen, helium, argon, and carbon dioxide. The choice of carrier gas is often dependant upon the type of detector which is used. The carrier gas system also contains a molecular sieve to remove water and other impurities. Sample injection port For optimum column efficiency, the sample should not be too large, and should be introduced onto the column as a "plug" of vapour - slow injection of large samples causes band broadening and loss of resolution. ...read more.

Conclusion

The sample vapourises to form a mixture of carrier gas, vapourised solvent and vapourised solutes. A proportion of this mixture passes onto the column, but most exits through the split outlet. The septum purge outlet prevents septum bleed components from entering the column. The difference between Medicines and Drugs People often get confused between the definition of a drug, and that of a medicine. There is a distinct difference- a drug is something which the doctor prescribes, whereas a medicine is what you as a patient can purchase from the chemist. It is an overall name given to the mixture, which consists of the active drug which the doctor prescribed, and any other substances such as sugar and gelatine. Contrary to what many people believe, medicine does not just come liquidised in a bottle- it can come in all shapes and sizes, in the form of tablets, capsules and even injections. ...read more.

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