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- W1991977170 abstract "A novel spectrophotometric method has been developed to estimate the total amounts of textile dyes on air monitoring filters in industrial hygiene applications. The method was developed in response to the complexity of the samples and the low levels of dyes which were anticipated to be present. These factors made conventional analytical techniques, such as HPLC, impractical for this particular series of analyses. The method developed here utilizes an average “spectral” absorptivity constant calculated from a given set of dyes over a specified wavelength interval. By measuring the total sample absorbance over the wavelength interval, an estimate of the quantity of dyes present can be obtained from a Beer's Law calculation using the average spectral absorptivity constant. Feasibility of the method was demonstrated on dye mixture solutions containing both 10 and 20 dyes, with as many as five different dye classes being present simultaneously. Dye recovery experiments established that the air filter extraction procedure produced recoveries in the 78–101% range for 40- to 160-µg total amounts. Simulated textile plant air filters were prepared which contained 18 dyes from three dye classes at levels ranging from 40- to 180-µg total amounts. After correcting for dye recovery, the total dye estimates were observed to have relative errors ranging from 0 to −24%. The primary factors affecting the accuracy of the total dye estimation method are the number of component dyes in the mixture, the standard deviation of their experimentally determined spectral absorptivity constants, and the levels of dyes present on the air filter." @default.
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- W1991977170 date "1990-04-01" @default.
- W1991977170 modified "2023-09-26" @default.
- W1991977170 title "A Spectrophotometric Method of Estimating Total Levels of Textile Dyes on Air Monitoring Filters" @default.
- W1991977170 doi "https://doi.org/10.1080/15298669091369529" @default.
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