Phosphine is also used as a dopant in the semiconductor industry and a precursor for the deposition of compound semiconductors. Recently, high purity tertiary butyl phosphine (TBP) has been developed as a less hazardous liquid alternative to highly toxic phosphine gas for application in Metalorganic Vapor Phase Epitaxy (MOVPE) of III-V compound semiconductors.
[email protected]The newly developed DensiControl IN allows easy and precise verification of density monitor switching points without SF 6 emission. This device is also used to check whether the switching points are triggered in time without having to disassemble the density monitor. You only need to install a lock valve (3-1150-R...) on the gas compartment.
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Get PriceMany standards include different VOCs in their TVOC grouping, or assign different weights when calculating TVOC. This can make the definition of TVOC difficult to parse, as we can't say definitively what VOCs are in TVOC. For example, one scientist may use a grouping of 20 VOCs to define TVOC, while another may draw from 30 different VOCs.
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