+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

The use of precipitation chromatography in geochemical prospecting; mineral identification with disposable agar gel columns

, : The use of precipitation chromatography in geochemical prospecting; mineral identification with disposable agar gel columns. Economic Geology and the Bulletin of the Society of Economic Geologists 57(2): 248-259

Agar gel columns containing ammonium sulfide precipitant were investigated for possible use in mineral identification and trace element determination. The method is described, and optimum conditions for maximum sensitivity were determined. Co, Zn, Pb, Bi, Sb, and Sn were determined in solutions containing 20 p.p.m. or less. Fe, Cd, Cu, and As were determined in solutions containing less than 300 p.p.m. Hg was least sensitive, requiring a concentration of 600 p.p.m. Preliminary testing to determine accuracy in qualitative identification was carried out on 80 synthetic unknowns composed of 3 component mixtures of the previously mentioned ions plus Mo and Ni. Fe, Pb, Cd, and Co were identified correctly in all unknowns. Only As, Sb, and Sn gave any extensive difficulty, these having been determined with less than 80% accuracy. Sixty-one mineral samples were analyzed by this method, and the results were compared with those obtained from the emission spectrograph. It was found that the major metallic constituents of minerals can be determined with a high degree of accuracy. However, in most cases the minor constituents were missed. It was concluded that in special cases the method would be a useful field tool. Advantages of the technique are as follows: the equipment is inexpensive and portable; all metals that produce insoluble sulfides may be identified in mixtures by a single simple procedure; concentration may be estimated roughly by density of precipitate. Disadvantages of the technique are as follows: considerable experience is necessary to correctly interpret the results; a 48-hour period is necessary for the complete development of a chromatogram; the method is not very sensitive for certain of the metal ions.


Other references

Fujii, Y.; Magder, S.; Cernacek, P.; Goldberg, P.; Guo, Y.; Hussain, S.N., 2000: Endothelin receptor blockade attenuates lipopolysaccharide-induced pulmonary nitric oxide production. Increased nitric oxide (NO) synthesis by the inducible nitric oxide synthase (iNOS) has been shown to contribute to the development of acute lung injury and delayed hypotension in animals injected with bacterial lipopolysaccharides (LPS). Recent e...

Mcilwain, L.; Sokol, L.; Moscinski, L.C.; Saba, H.I., 2003: Acute myeloid leukemia mimicking primary testicular neoplasm. Presentation of a case with review of literature. We describe a new unique case of acute myeloid leukemia (AML) in a 21-yr-old male presenting with abdominal pain, bilateral testicular masses and gynecomastia. Further work-up with computed tomography of the chest, abdomen and pelvis revealed mass...

Freeman, A.K.; Mercer, N.S.G.; Roberts, L.M., 2013: Nasal asymmetry in unilateral cleft lip and palate. Comparison of nasal asymmetry between unilateral cleft lip and palate (UCLP) patients with and without nasal correction at primary repair. Assessment of the value of <italic>Symnose</italic> as a routine research tool. 75 ten-year-old...

Groot, I.M.N.; Kleyn, A.W.; Juurlink, L.B.F., 2011: The energy dependence of the ratio of step and terrace reactivity for H2 dissociation on stepped platinum. Angewandte Chemie 50(22): 5174-5177

Huang, Y.; Agrawal, B.; Sun, D.; Kuo, J.S.; Williams, J.C., 2011: Microfluidics-based devices: New tools for studying cancer and cancer stem cell migration. Cell movement is highly sensitive to stimuli from the extracellular matrix and media. Receptors on the plasma membrane in cells can activate signal transduction pathways that change the mechanical behavior of a cell by reorganizing motion-related...

Segarini, P.R.; Ziman, J.M.; Kane, C.J.M., 1992: Two novel patterns of transforming growth factor b (TGF-b) binding to cell surface proteins are dependent upon the binding of TGF-b1 and indicate a mechanism of positive cooperativity. The Journal of Biological Chemistry 267: 48-53

Kvícala, V.; Bauer, J.; Baláková, H., 1982: Functional myelography. Results of tests during lumbar myelography. Ceskoslovenska Neurologie A Neurochirurgie 45(6): 357-362

Wilson, R.F., 1961: Amino-acid content of herbage and herbage proteins. The cystine content of lucerne herbage and lucerne and ryegrass protein sampled at various dates ranged from 1.0-1.6 g cystine/16g N .

Yanagisawa K.; Tache Y., 1990: Central vagal stimulation by intracisternal injection of trh analog rx 77368 increases gastric histamine secretion in the rat. Gastroenterology 98(5 PART 2): A151

Dow, J.; Gaudet, M.; Turmel, E., 2014: Crash rates of quebec drivers with medical conditions. Using a databank that combines comprehensive medical data with the driving records of 96% of the drivers in Quebec, odds ratios were calculated for crash risk involving death or serious injury according to the diagnosis of medical conditions tradi...