(1) Solid sample electrodes were prepared from a caesium chloride solution, carbon and “sirupus simplex”, and the amount of caesium chloride was spectrographically determined with a sensitivity of 2×10−4%. (2) The analysis was conducted on sample electrodes containing 0.0005–0.015% of CsCl. (3) Both the “method of comparison” and the graphical method were found to be applicable for the determination of caesium chloride with a fair degree of exactness, error being always caused within the permissible limit.
(1) Solid sample electrodes were prepared from carbon, “sirupus simplex” and varying amounts of lithium chloride and the amount of lithium chloride was spectrographically determined with a sensitivity of 3×10−5% with respect to the line at λ=6707.9 Å, and with that of 1×10−4% with respect to the line at λ=6103.6 Å. (2) The method of comparison was found to be applicable for the determination of lithium chloride throughout the range of 0.001–0.050%. (3) Several samples containing lithium were analysed by the graphical method and were found to contain 1–12×10−3% of lithium chloride. (4) Several samples of clay produced in Seto and Inuyama were found to contain 3×10−5% of lithium by the graphical method.
(1) l-Talose is formed by the reduction of l-talonic lactone obtained from l-galactonic acid by means of epimerisation. It is a colourless syrup with sweet taste having a specific rotation of −19.8° at 14°. (2) l-Talonic acid (m.p. 137–138°, [α]D15° −18.2°) and l-talonic lactone (m.p. 133–134.5°, [α]D17° + 34.4°) are obtained. (3) Brucine salt of l-talonic acid (m.p. 139–140°, [α]D14° −23.7°) is suited for the identification of the acid. The amide (m.p. 119–120.5°, [α]D18° + 13.3°) and the phenylhydrazide (m.p. 161–162°, [α]D13° + 26.0°) are also obtained. (4) l-Galactonic acid is conveniently prepared from citrus pectic acid.