Colorimetric detector tubes

Pilzecker, R Bamnbach, J.I. Kurte, R., Detection of decomposition products in SF a comparison of colorimetric detector tubes and ion mobility spectrometry. Proceedings of the Conference on Electrical Insulation and Dielectric Phenomena, 2002, 865-868 DOI 10.1109/CEIDP.2002.1048932. 

The use of colorimetric detector tubes in a diffusive mode is an extension of this type of method. In this case, reaction with a substrate contained in a tube produces a color change, the extent of which is related to the applied dose. In addition to the drawbacks of colorimetric analysis mentioned above, there is a further inaccuracy involved in reading the extent of the color change, which is complicated by being nonlinear with respect to exposure dose (concentration multiplied by time). An example of this type of sampler is shown in Figure 2 (far left). 

After two minutes a determination of the ammonia concentration within the chamber should be made using the high range colorimetric detector tube. A concentration of 1000 ppm ammonia or greater shall be generated before the exercises are started. 

The Chemical Agent Water Test Kit M272 consists of colorimetric detector tubes and enzyme impregnated detection tickets for nerve agent detection. The kit is designed to detect the presence of chemical agents in water samples. 

These products are available in several different sets of colorimetric detector tubes. Each set is designed for detection of specific TICs, TIMs, or CWAs at or below IDLH or close to AEL levels. 

Detector Tubes/Pumps Detector tube pumps are portable equipment which, when used with a variety of commercially available detector tubes, are capable of measuring the concentrations of a wide variety of compounds in industrial atmospheres. Operation consists of using the pump to draw a known volume of air through a detector tube designed to measure the concentration of the substance of interest. The concentration is determined by a colorimetric change of an indicator which is present in the tube contents. 

LDDT Long-duration detector tubes PC PRO-TEK PT, Colorimetric Readout UV Ultraviolet... 

Several gas detector tubes are used in conjunction with common colorimetric reactions to detect butadiene. The reactions include the reduction of chromate or dichromate to chromous ion and the reduction of ammonium molybdate and palladium sulfate to molybdemun blue (Saltzman Harman, 1989). 

Ethylene oxide in air may be measured directly in situ by a rapid colorimetric technique (Pritts et al., 1982). Air is drawn through a multipart detector tube consisting of three reactor tubes containing periodic acid, xylene, and cone. E12S04, respectively. Ethylene oxide is oxidized by periodic acid to formaldehyde... 

The M18 detection kit and the M256A1 kit are mihtary items. The M18 is a colorimetric device for measuring the concentration of selected airborne chemicals. The Ml8 comes with detector tubes for cyanide, phosgene. Lewisite, sulfur mustard, and nerve agents GA, GB, GD, and VX. 

Relatively inexpensive portable colorimetric indicators are now commonly used to detect the presence of a variety of contaminant gases in the atmosphere. These are normally specific for one or perhaps a series of gases. For example, the NBS colorimetric detector uses an indicator tube that contains a 15-mm section of yellow palladous silico-molybdate gel the gel changes color when exposed to carbon monoxide at concentrations as low as 0.001 vol. % in air. Figure 52 shows one version of a commercial unit used for carbon monoxide as well as carbon dioxide, the unsaturated hydrocarbons, and a variety of other gases this unit can also be used to determine the approximate concentrations of contaminants in liquid oxygen. Precise determinations can be made with a variety of analytical tools, including infrared... 

B. SAMPLE ANALYSIS B. 1 DIRECT READING INSTRUMENTS B.1.1 DETECTOR TUBES Colorimetric 33... 

Specifically, detector tubes operating on colorimetric reaction principles have been used to determine the concentration of alcohol in breath for traffic safety Alcohol mea-smements in breath have been thoroughly studied and scrutinized because of the forensic... 

The confirmation air monitoring system is used to help determine the cause of an alarm. The confirmation air monitoring system is comprised of two types of systems the Depot Area Air Monitoring System (DAAMS) and the colorimetric gas detector tubes. 

Colorimetric or colour indicator (detector) tubes should be used as in the manufacturer s directions and thrown out on the use-by date. Some tubes give a colour with another chemical (called cross sensitivity ), so the manufacturer s notes should be checked. A new type as noted earher still uses detector chemicals but measures changes electronically, not by colour. 

As in the case of any flammable gas, never use a flame in trying to detect carbon monoxide leaks. Portable detection equipment or the formation of bubbles by a soapy solution applied to a suspected area will indicate leaks. Carbon monoxide alarm detectors must be installed in all indoor areas in which the gas is regularly used in more than small laboratory amounts. Colorimetric sniffer tubes are also utilized for detection of carbon monoxide. Samples of atmospheric air containing carbon monoxide are aspirated through such tubes. 

Colorimetric detectors often take the form of badges and tubes where the signal (color change) is detected by the human eye instead of electronic devices. Therefore, most colorimetric detectors can be made small and simple, are less costly to produce, and do not use electric power for operation. 

Prickly or Irritating-type (acid gases) Detector tubes or colorimetric tape detectors... 

Specifically, detector tubes operating on colorimetric reaction principles have been used to determine the concentration of alcohol in breath for traffic safety. Alcohol measurements in breath have been thoroughly studied and scrutinized because of the forensic and legal repercussions associated with the results. Portable devices have been developed for field use with on-site analysis of alcohol. These portable devices eould be adapted for use with other organic solvents of interest in industrial hygiene and occupational health. 

Acoustic wave sensors are also used to detect nerve and blister agents. The surface acoustic wave chemical agent detector (SAW Mini-CAD) is a commercially available, pocket-sized instrument that can monitor for trace levels of toxic vapors of sulfur-based mustard agents (e.g., distilled mustard) and G nerve agents (e.g., tabun, sarin, soman) with a high degree of specificity. Colorimetric tubes are the... 

Color change chemistry detectors can detect nerve, vesicant, and blood agents. Colorimetric tubes are the most common detection technology used by HAZMAT... 

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