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- W2315802812 abstract "A procedure for sampling and quantifying trace amounts of free hydrogenated diphenylmethane diisocyanate (HMDI) vapors in air is described. The free HMDI is reacted with a UV-absorbing chromophore, aniline, to form the bis-N-phenyl carbamate of HMDI, and the derivative it separated from any interfering compounds in the sample matrix and quantified using high performance liquid chromatography (HPLC). Determination of the concentration of bis-N-phenyl carbamate of HMDI is accomplished through the external standards technique. This method can be used to make free HMDI determinations as low as 40 parts per trillion, using a standard, commercial, UV absorbance detector set at 230 nm." @default.
- W2315802812 created "2016-06-24" @default.
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- W2315802812 date "1981-06-01" @default.
- W2315802812 modified "2023-09-23" @default.
- W2315802812 title "Determination of Trace Amounts of 4,4'-Methylene bis(Cyclohexyl Isocyanate) in Air by High Performance Liquid Chromatography" @default.
- W2315802812 doi "https://doi.org/10.1093/chromsci/19.6.321" @default.
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