Abstract

In the determination of calcium, lithium, and potassium in a refractory matrix such as thorium dioxide, the task can be accomplished using a carrier distillation technique with gallium oxide or silver chloride as the carrier. Complications arise, however, if low concentrations require the use of the most sensitive analytical lines of each: e.g., Ca 3933.67, Li 6707.84, and K 7664.91. The resultant need for broad wavelength coverage at highest sensitivity would require two or three separate exposure conditions with three different photographic plate emulsions. Ideally, Ca 3933.67 Å would require an SA-1 emulsion; Li 6707.84 Å would require a II-F, usually with a filter to remove scattered light; and K 7664.91 Å would require a 1-N with a filter (Corning Glass 3484) mounted in front of the slit to remove interfering second-order cyanogen bands.

Simultaneous voltage and calcium imaging and optogenetic stimulation with high sensitivity and a wide field of view

Cuong Nguyen, Hansini Upadhyay, Michael Murphy, Gabriel Borja, Emily J. Rozsahegyi, Adam Barnett, Ted Brookings, Owen B. McManus, and Christopher A. Werley
Biomed. Opt. Express 10(2) 789-806 (2019)

Spectographic Determination of Thorium in Tungsten Filament Wire*

S. L. Parsons
J. Opt. Soc. Am. 33(12) 659-662 (1943)

Determination of thorium and uranium in solution by laser-induced breakdown spectrometry

Arnab Sarkar, Devanathan Alamelu, and Suresh Kumar Aggarwal
Appl. Opt. 47(31) G58-G64 (2008)

Simultaneous determination of refractive index, extinction coefficient, and void distribution of titanium dioxide thin film by optical methods

S. Y. Kim
Appl. Opt. 35(34) 6703-6707 (1996)

Thorium Lamps and Interferometrically Measured Thorium Wavelengths

Francisco P. J. Valero
J. Opt. Soc. Am. 58(4) 484-489 (1968)