Spark Analysis of Semi-Microsamples*

W. J. Wark

doi:10.1364/JOSA.41.000465

Journal of the Optical Society of America
Vol. 41,
Issue 7,
pp. 465-467
(1951)
•https://doi.org/10.1364/JOSA.41.000465

Spark Analysis of Semi-Microsamples

W. J. Wark

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W. J. Wark, "Spark Analysis of Semi-Microsamples*," J. Opt. Soc. Am. 41, 465-467 (1951)

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Abstract

A new method of mounting semi-microsamples for spectrographic analysis is described. The method is very flexible and is particularly adapted to those procedures involving limited samples. An appreciable decrease in the cost of high purity spectrographic materials can be obtained. The method can be applied to arc or spark techniques without modification.

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	Rh 3434.8/Pt 3431.8
Sample No.	Intensity ratios*	Deviation
1	1.31	0.07
2	1.29	0.09
3	1.38	0.00
4	1.37	0.01
5	1.39	0.01
6	1.40	0.02
7	1.32	0.06
8	1.34	0.04
9	1.36	0.02	Percentage mean deviation=2.2%
10	1.39	0.01
11	1.37	0.01
12	1.48	0.10
13	1.39	0.01
14	1.36	0.02
15	1.36	0.02
16	1.42	0.04
17	1.42	0.04
18	1.43	0.05
	Average 1.38	Average 0.03

	Cobalt 3049.0/Iron 3014.1
Specimen No.	Test No. 1	Test No. 2	Test No. 3	Test No. 4	Test No. 5	Average	Average deviation
1	1.38	1.40	1.45	1.40	1.50	1.43	0.04
2	1.55	1.60	1.42	1.38	1.49	1.49	0.07
3	0.86	0.80	0.70	0.75	0.78	0.78	0.04
4	0.54	0.49	0.51	0.46	0.60	0.52	0.04
5	0.69	0.69	0.73	0.75	0.66	0.70	0.03
6	0.65	0.65	0.63	0.72	0.66	0.66	0.02
7	1.05	1.06	0.90	1.08	1.07	1.03	0.05
8	0.90	0.87	0.90	0.82	0.83	0.86	0.03
9	0.86	0.83	0.71	0.78	0.74	0.78	0.05
10	1.07	1.14	1.07	1.03	1.09	1.08	0.03
11	0.72	0.64	0.70	0.79	0.75	0.72	0.04
12	0.82	0.86	0.77	0.79	0.73	0.79	0.05
13	1.53	1.58	1.36	1.56	1.50	1.50	0.06

	Rh 3434.8/Pt 3431.8
Sample No.	Intensity ratios*	Deviation
1	1.31	0.07
2	1.29	0.09
3	1.38	0.00
4	1.37	0.01
5	1.39	0.01
6	1.40	0.02
7	1.32	0.06
8	1.34	0.04
9	1.36	0.02	Percentage mean deviation=2.2%
10	1.39	0.01
11	1.37	0.01
12	1.48	0.10
13	1.39	0.01
14	1.36	0.02
15	1.36	0.02
16	1.42	0.04
17	1.42	0.04
18	1.43	0.05
	Average 1.38	Average 0.03

	Cobalt 3049.0/Iron 3014.1
Specimen No.	Test No. 1	Test No. 2	Test No. 3	Test No. 4	Test No. 5	Average	Average deviation
1	1.38	1.40	1.45	1.40	1.50	1.43	0.04
2	1.55	1.60	1.42	1.38	1.49	1.49	0.07
3	0.86	0.80	0.70	0.75	0.78	0.78	0.04
4	0.54	0.49	0.51	0.46	0.60	0.52	0.04
5	0.69	0.69	0.73	0.75	0.66	0.70	0.03
6	0.65	0.65	0.63	0.72	0.66	0.66	0.02
7	1.05	1.06	0.90	1.08	1.07	1.03	0.05
8	0.90	0.87	0.90	0.82	0.83	0.86	0.03
9	0.86	0.83	0.71	0.78	0.74	0.78	0.05
10	1.07	1.14	1.07	1.03	1.09	1.08	0.03
11	0.72	0.64	0.70	0.79	0.75	0.72	0.04
12	0.82	0.86	0.77	0.79	0.73	0.79	0.05
13	1.53	1.58	1.36	1.56	1.50	1.50	0.06

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Journal of the Optical Society of America