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Selective determination of lithium in biological fluids using flow injection analysis

✍ Scribed by G.E. Pacey; Y.P. Wu; K. Sasaki

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
587 KB
Volume
160
Category
Article
ISSN
0003-2697

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✦ Synopsis

The use of flow injection analysis to automated extraction methods for the determination of lithium ion utilizing crown ethers or cryptands is demonstrated. The ion-pair extraction of cryptand 2 11, lithium, and resazurin exhibits a linear range for lithium ion of 70 ppb to 2.1 ppm. This method could tolerate up to 1000 ppm sodium ion. The chromogenic crown ether, 1-(2-hydroxy-5-nitrobnzyl)-l-aza-4,7,1O-trioxacyclododecane, exhibits a linear range for lithium ion of 0.3 to 2 ppm. A sodium ion concentration of 230 ppm can be tolerated. Both extraction systems were used in the automated determination of lithium in blood serum and urine. Both methods agreed well with the known and/or atomic absorption values. o 1987 Academic Press, Inc.

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