Chemical monitoring devices

These legal implications necessitate that there be continuously operating chemical monitoring devices both inside and outside the plant. 

Personal monitoring devices (sometimes referred to as "dosimeters") are carried or worn by individuals and are used to measure that individual s exposure to particular chemical(s). Devices that include a pump are called "active" monitors devices that do not include a pump are called "passive" monitors. Such devices are currently used for research purposes. It is possible that sometime in the future they may also be helpful in lAQ investigations in public and commercial buildings. 

Vale C, Rosa-Santos F, Walter C et al (2007) Advanced observation devices for chemical monitoring of water quality. In 1st Riskbase Thematic Workshop, Monitoring and Assessment of River Pollutants a step towards the implementation of risk based management plans. Oral presentation, Lisbon, May 17-18... 

APD 2000 A portable, hand-held chemical detection and monitoring device that detects chemical warfare agents, recognizes pepper spray and Mace, and identifies hazardous compounds. 

All passive monitoring devices operate on the basis of diffusive transfer, regardless of whether they are classified as diffusion, permeation or unclassified (e.g., SPMDs), and the rate-limiting barrier is the step with the greatest resistance to mass transfer (see Figure 3.1). Pick s first law is the fundamental law of diffusion. It states that the flux of a chemical in the x-direction (j , e.g., ng cm d ) is proportional to the concentration gradient (9C/9x)... 

Fig. 15.14 Analytical techniques for time-resolved headspace analysis. An electronic nose can be used as a low-cost process-monitoring device, where chemical information is not mandatory. Electron impact ionisation mass spectrometry (EI-MS) adds sensitivity, speed and some chemical information. Yet, owing to the hard ionisation mode, most chemical information is lost. Proton-transfer-reaction MS (PTR-MS) is a sensitive one-dimensional method, which provides characteristic headspace profiles (detailed fingerprints) and chemical information. Finally, resonance-enhanced multiphoton ionisation (REMPI) TOFMS combines selective ionisation and mass separation and hence represents a two-dimensional method. (Adapted from [190])...

Acid can be injected into a flow assembly, but not to the same unit housing any other monitoring device, or other chemical injection port. An alternative is to add acid directly into a forebay, or the cooling tower sump (at a point of rapid mixing, but away from the pump suction, or chlorine/bromine discharge point, or bleed valve). 

CFR1910.1200 (h)(3)(i) 29CFR1910.1450(f)(4)(i)(A) 4.1.4.1 Methods and observations that may be used to detect the presence or release of a hazardous chemical in the work area (such as monitoring conducted by the employer, continuous monitoring devices, visual appearance or odor of hazardous chemicals when being released, etc.) ... 

In addition, the 1981 and 1982 studies looked at the exposure received by IPM scouts who frequented the treated fields to make damage assessments. Harvesters were also addressed In the 81-82 work. Tables I-III give an outline of each years monitoring by chemical and devices. Extensive photodocumentation of our programs, particularly of the mixing operations In all four studies, proved Invaluable In Identifying exposure mechanisms. Since reproduction of this media Is not practical here, conceptual observations from this source will be Interjected Into the discussion of the four Individual programs. 

Personal Monitoring Devices— Devices worn or carried by an individual to measure chemical exposure and/or radiation doses received. 

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