Paper tape monitors

Dharmarajan, V., Evaluation of personal continuous paper-tape monitors for toluenediisocyanate. Am. Ind. Hyg. Assoc. J., 57, 68-71, 1996. 

Brandon RW. 1983. The use of chemically impregnated paper tapes for toxic gas detection and monitoring. Anal Chem Symp Ser 17 726-731. 

Air (total isocvanatest None—direct air monitor Proprietary paper tape chemistry 5 ppb (lowest reported) 50 ppb max. No data Dharmarajan and Rando 1980... 

Another sensor system that further expands the capabilities of the Chronotox is the Personal Tape Sampler (PTS). The PTS (Figure 5) is a miniaturized gas monitor designed primarily to be worn by a worker during his entire workshift. It operates on the principle of specific chemical colorimetric reactions occurring on a dry chemically impregnated paper tape and gives... 

Aerosol monitor(s), automatic concentration range problems, 64 concepts, 63 data storage, 62 filter-paper tape, 66-67 flow conditions, varying, 65 isokinetic flow, 64 sample manipulation, 66 sampling time, 65-66... 

Gas monitoring systems should be chosen to suit their intended use since significant differences exist between available sensing technologies, price, and performance. There are basically two types of gas detection technologies. With instrumentation monitors, a sample of air is drawn through a piece of tubing, the sample draw line, to an analysis instrument, which is most commonly based on mass spectrometry, flame emission spectrometry, infrared spectrometry, or colorimetric (paper tape) response. 

The temperature jump equipment comprised a Hartley Measurements, joule heating temperature jump assembly with both oscilloscope output and a Varian trace superposition noise averaging facility for increasing signal to noise ratio, also equipped with an analogue to digital (paper tape) converter for data storage. The relaxation effect was monitored by fast kinetic spectrophoto-... 

All areas where phosphine is used or stored should be monitored with sensitive gas detection instruments. Leaks may be detected by special hydride detectors, chemically treated paper tapes that will change color when exposed to phosphine, detector tubes, and other detection devices. Detection of concentrations below the TLV level (0.3 ppm) should initiate corrective action, while higher concentrations should initiate an alarm calling for evacuation of all potentially exposed personnel. 

It is often necessary to monitor for gas leaks inside the gas cabinet or in the surrounding area. Sensors to monitor semiconductor gases are available based on a number of different technologies. Some of the types include solid state sensors, electrochemical sensors, and paper tape sensors that draw a sample from the sensing area to a remote location to react with chemicals on the tape. No one type of sensor is ideal for all types of gases. Gas detection is explained more fully in a separate section. 

Fifty-seven chrome 1-aIviinel thermocouples measured the temperatures within the reactor. A Doric multipoint digital recorder monitored the thermocouple readings and printed these readings on paper tape. 

Workers associated with the application of carbaryl (applicator, mixer-loader, bystander and aerial flagger) and re-entry workers (apple thinners) were monitored by a modification of the procedure of Durham and Wolfe (3). The workers were fitted with a disposable jacket (Safety and Supply Co., Seattle, WA) to which 10 x 10 cm pads were attached with masking tape. One pad was attached as close to the neck as possible on each shoulder and on the chest and the back of each subject. One pad was also placed on each forearm midway between the elbow and wrist. The pads were constructed by backing an 8 ply gauze compress with two pieces of heavy filter paper and attaching these together in the center with a staple. 

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