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It's not exactly specific, and discusses 'dust' not vacuum contents, but I found wikipedia's entry on domestic dust interesting:
Originally posted by wikipedia
The precise composition of domestic dust may vary widely:
“ The quantity and composition of house dust varies greatly with seasonal and environmental factors such as the surroundings, exchange of outside air, age of the house, building materials and their condition, and the quantity of furniture and carpets, as well as their state of preservation. The composition of dust also depends upon the ventilation, and heating systems, cleaning habits, activities of the occupants or users of a room, etc. House dust consists of inorganic and organic matter, and the relative proportions of these components may vary considerably. Kindergartens dust often consists almost entirely of inorganic materials like sand, loam, and clay from sand pits. On the other hand, house dust from the homes of animal owners with worn out carpets consists nearly completely of organic material. In a study of 318 house samples, the proportion of organic matter ranged from between <5% and >95% (Butte and Walker, 1994). Fergusson, et al. (1986) reported the organic content of house dust from 11 homes in Christchurch, New Zealand, ranged from 25.7% to 56.5%. Floor dust from seven Danish offices had a mean organic fraction of 33% (Mølhave et al., 2000). ”
According to the German Environmental Survey, approximately 6 mg/(m²·d) of house dust is formed in private households, depending primarily on the amount of time spent at home. Nearly 1000 dust particles per square centimetre settle on domestic surfaces every hour. Some dust consists of human skin. Scientists estimate that humans shed the entire outer layer of skin every day or two, at a rate of 7 million skin flakes per minute, which corresponds to a mass emission rate of about 20 milligrams per minute."Dust bunnies" are small clumps of fluff that form when sufficient dust accumulates.
“ The quantity and composition of house dust varies greatly with seasonal and environmental factors such as the surroundings, exchange of outside air, age of the house, building materials and their condition, and the quantity of furniture and carpets, as well as their state of preservation. The composition of dust also depends upon the ventilation, and heating systems, cleaning habits, activities of the occupants or users of a room, etc. House dust consists of inorganic and organic matter, and the relative proportions of these components may vary considerably. Kindergartens dust often consists almost entirely of inorganic materials like sand, loam, and clay from sand pits. On the other hand, house dust from the homes of animal owners with worn out carpets consists nearly completely of organic material. In a study of 318 house samples, the proportion of organic matter ranged from between <5% and >95% (Butte and Walker, 1994). Fergusson, et al. (1986) reported the organic content of house dust from 11 homes in Christchurch, New Zealand, ranged from 25.7% to 56.5%. Floor dust from seven Danish offices had a mean organic fraction of 33% (Mølhave et al., 2000). ”
According to the German Environmental Survey, approximately 6 mg/(m²·d) of house dust is formed in private households, depending primarily on the amount of time spent at home. Nearly 1000 dust particles per square centimetre settle on domestic surfaces every hour. Some dust consists of human skin. Scientists estimate that humans shed the entire outer layer of skin every day or two, at a rate of 7 million skin flakes per minute, which corresponds to a mass emission rate of about 20 milligrams per minute."Dust bunnies" are small clumps of fluff that form when sufficient dust accumulates.
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