| 摘要 |
Compsns. usable in omo-densitometry contain at least one water-sol. deriv. of a metal of atomic wt. between 24 and 66 in an appropriate aq. vehicle. The sol. salts used are pref. those of magnesium, calcium, manganese, iron, zinc and cobalt. Preferred anions are chloride, nitrate, sulphate, acetate, gluconate, lactobionate, glucoheptonate, gluconoglucoheptonate, or a complex anion derived from ethylene diamine tetra acetic acid, ethylene glycol bis(beta amino ethyl ether)-N,N,N',N'-tetra acetic acid, methylene diamine, -N,N'-diacetic-N,N'-di alpha propionic acid, or ethylene diamine, -N,N'-diacetic -N,N'-di-beta propionic acid.
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