| http://www.w3.org/ns/prov#value | - Preferably, the solvents used in the present invention are chlorinated solvents such as methylene chloride, chloroform, carbon tetrachloride, chloroethane, dichloroethane, tetrachloroethane, 1-chloropropane, 2-chloropropane, and chlorobenzene; nitrile solvents such as acetonitrile, propionitrile, and benzonitrile; hydrocarbon solvents such as n-pentane, cyclopentane, methylcyclopentane, n-hexane,
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