Sentence:  Liter quantities of Mallinckrodt , low sulfur , reagent grade carbon tetrachloride were <WSD>saturated</WSD> with * * f and * * f and illuminated for about 50 hours with a 1000 watt tungsten lamp at a distance of a few inches . 
Meaning of the word marked with <WSD> tags:  cause (a chemical compound, vapour, solution, magnetic material) to unite with the greatest possible amount of another substance