NOVELTY - Detecting alcohol, involves taking a sample in a sample volume, presenting the sample volume to a delivery path where the sample volume is presented to a chamber (17) for vapor equalization with the air in it and the chamber includes unit (29) for temperature conditioning the vapor equalization in the chamber between the sample volume and the air present there, the chamber being associated with a fuel cell (22) where an electrical voltage across the fuel cell relative to a developed temperature condition is indicative of alcohol content.    USE - For detecting alcohol in a sample volume i.e. blood (claimed) particularly for detecting blood ethylalcohol.    ADVANTAGE - The blood alcohol accurately represents the state of the patient because it is free from the disadvantages of saliva, breath or urine which can be vastly different from the level of alcohol in the brain and other organs for reasons discussed previously. The level of blood alcohol will be obtained from any patient whether conscious, incapacitated, comatose, injured, cooperative or non co-operative via a simple fingerprick blood sample. The medical profession prefers to rely on blood alcohol levels over any other medium such as breath or saliva because blood alcohol relates directly to the effects of alcohol on the brain and other organs. The medical profession routinely obtain and handle blood samples for a range of other medical tests and are conversant and readily prepared in their areas such as emergency department (ED)'s for the taking and handling of blood samples. The quantity of blood required is very small being typically one drop, and this quantity is readily obtained by a number of medical lancet devices already used routinely in healthcare, such devices requiring little or no training and virtually painless in use. The blood alcohol measurements can easily be repeated from time to time as necessary to monitor alcohol levels and avoid the risk of alcohol poisoning from alcohol still remaining in the stomach of an incapacitated patient. The test device will also detect the simpler homologue methanol (from methylated spirit) which is toxic and which is often implicated in alcoholics living on the street who frequently require medical attention in ED's. The blood alcohol level may be incorporated into other devices separately or simultaneously, for e.g. detection of blood glucose and blood alcohol simultaneously. The blood alcohol result is achieved in such a way that it is unlikely to be admissible as evidence, thus preventing patients from refusing a test in case they are subjected to legal action.    DETAILED DESCRIPTION - Detecting alcohol, involves taking a sample in a sample volume, presenting the sample volume to a delivery path where at least a portion of the sample volume is presented to a chamber (17) for vapor equalization with the air in it and the chamber includes unit (29) for temperature conditioning the vapor equalization in the chamber between the sample volume and the air present there, the chamber being associated with a fuel cell (22) where an electrical voltage across the fuel cell relative to a developed temperature condition is indicative of alcohol content in the vapor equalization and so the sample volume taken. The collector includes and/or is coated with a blood anti-clotting agent. An INDEPENDENT CLAIM is included for a detection apparatus comprising: a chamber associated with a delivery path for a sample volume; conditioning unit for the chamber to temperature condition the sample volume in a vapor equalization with air in a head space for the chamber; a fuel cell associated with the head space to sample the vapor equalization to determine the present electrical voltage in the fuel cell indicative of alcohol level in the vapor equalization relative to a temperature condition.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic arrangement of detection apparatus and its collector.    Instrument case (1)    Collector device (7)    Chamber (17)    Conditioning unit (29)    Fuel cell (22)