What is Gastec detector tube?
Gastec Detector Tubes are used in environments where sampling, screening and TWA measurement is required. They are of the highest quality for accurately analysing a wide variety of gases, vapours and ground substances.
How does a detector tube work?
The actual gas detector device contains a thin, sealed glass tube with a chemical agent inside that reacts with the gas or vapor you’re seeking to measure in the air. The chemical agent inside the tube changes color when the detector senses the gas or vapor, then you change the tube within the detector between tests.
How do you read a detector tube?
To read the results, look at the measurements lining the tube and find the spot where the color ends. This color change, or stain as it is referred to, will have a length directly tied to the gas concentration. This can then be read directly on the tube, using the pre-printed gradations.
Why do detector tubes have different ranges?
Gas detector tubes measure concentrations of specific gases in the air. The amount found depends on the particular glass container you use as even those for the same gas will measure different parts per million (ppm) of the gas. Some gases can be toxic to people who inhale them.
How do you detect benzene?
The most common detector currently used with a GC is a mass selective detector (mass spectrometer MS) which provides a positive identification of benzene based on its chemical structure, though flame ionization and photoionization can be used for quantification.
How do you test for benzene in the air?
The amount of phenol in urine has been used to check for benzene exposure in workers. The test is useful only when you are exposed to benzene in air at levels of 10 ppm or greater.
How accurate are detector tubes?
The accuracy of detector tubes generally is considered to be +/-25% of the reading. This is based on the criteria for certification of detector tubes as originally defined by the National Institute for Occupational Safety and Health (NIOSH).
How do you test a benzene ring?
Human exposure to benzene is easily tested by one of three methods: blood testing, urine testing, or a breath test.
How do you test for benzene?
Blood counts of all components of the blood and examination of bone marrow are used to determine benzene exposure and its health effects. For people exposed to relatively high levels of benzene, complete blood analyses can be used to monitor possible changes related to exposure.
How do you identify benzene?
The usual structural representation for benzene is a six carbon ring (represented by a hexagon) which includes three double bonds. Each of the carbons represented by a corner is also bonded to one other atom. In benzene itself, these atoms are hydrogens.
What is another name for benzene?
Benzol
Benzene
| Names | |
|---|---|
| Preferred IUPAC name Benzene | |
| Other names Benzol (historic/German) Cyclohexa-1,3,5-triene; 1,3,5-Cyclohexatriene [6]Annulene (not recommended) | |
| Identifiers | |
| CAS Number | 71-43-2 |
Is benzene lighter than air?
Benzene evaporates into the air very quickly. Its vapor is heavier than air and may sink into low-lying areas. Benzene dissolves only slightly in water and will float on top of water.