Chemistry: analytical and immunological testing – Metal or metal containing – Li – na – k – rb – cs – fr – be – mg – ca – sr – ba – ra
Patent
1986-10-22
1988-03-29
Richman, Barry S.
Chemistry: analytical and immunological testing
Metal or metal containing
Li, na, k, rb, cs, fr, be, mg, ca, sr, ba, ra
436 74, 436164, 436178, G01N 2175, G01N 3320, G01N 3350
Patent
active
047343761
ABSTRACT:
Chromogenic aza-12-crown-4 ethers which can be used for the spectrophotometric determination of lithium ion in aqueous solutions are disclosed. The compounds of the invention are particularly useful for the analysis of Li.sup.+ in the presence of Na.sup.+, a situation common in biological and geological systems. The compounds [e.g., 1-(2-oxy-5-nitrobenzyl)-1-hydro-1-aza-4,7,10-trioxacyclododecane], their methods of manufacture, and methods of utilizing the compounds for the analysis of lithium are disclosed.
REFERENCES:
patent: 4367072 (1983-01-01), Vogtle et al.
patent: 4436923 (1984-03-01), Pacey et al.
patent: 4645744 (1987-02-01), Charlton et al.
Lockhart et al., Journ. Anal. Chem. Society, Perkins Trans I (1973) England "Preparation of Some Nitrogen-Containing Polyether Crown Compounds", pp. 577-581.
G. E. Pacey et al., Talanta (1984), vol. 31, No. 3, "Ion-Pair Extractions with 12-Crown-4 and its Analogues", pp. 165-168.
Nakamura et al., Chemistry Letters, pp. 1305-1306, 1981.
Nakamura et al., Analytical Chemistry, vol. 52, No. 11, pp. 1668-1671, 1980.
Pacey Gilbert E.
Sasaki Ken-ichi
Hill Jr. Robert J.
Richman Barry S.
The President & Trustees of the Miami University
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