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Spectral determination of calcium barium and strontium in bio samples food products and water


, : Spectral determination of calcium barium and strontium in bio samples food products and water. Gigiena i Sanitariya (11): 100-101

A method of determining Ca, Ba and Sr in biosamples, food products and drinking water was developed using the spectrograph ISP-22. Because of the failure of the spark testing system to produce positive results, a generator was substituted with 8 amp current and exposure of 30 s. The solution is pressed into a discharge against the face of a carbon electrode, ground at the surface and preliminarily processed with a 3% solution of polystyrene in benzol. The upper electrode consists of a carbon stem ground to an angle of 120.degree. The preliminary calcination of the upper and lower electrodes was accomplished in an arc of alternating current at 8 amps for 30 s. A solution of Co and nitric acid was used as an internal standard, while the basic calibrating solutions were prepared from spectrally pure Ca salts, Ba and Sr. The concentrations of the elements in the calibrating solutions and the pH of the solutions closely matched the analogous levels in analyzed solutions. The results of parallel determination of Ca, Ba and Sr concentrations by the spectral and chemical methods have a good convergence.

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Related references

Zinca, S.; Cotrut, M.; Ivas, E., 1969: Study of the radioactivity of some food products for man and domestic animals. 3. Determination of the radionuclides strontium and barium in plant products. 140Ba and 89Sr/90Sr/90Y were absent from maize, Vicia sativa and flax but present in wheat, barley, oats, Phaseolus vulgaris, soyabeans, peas and lucerne at ( beta -activities of 1.6-14.1 and 1-9.9 pCi/100 g DM, respectively.

Cataldi, T.R.I.; Margiotta, G.; Zambonin, C.G., 1998: Determination of sugars and alditols in food samples by HPAEC with integrated pulsed amperometric detection using alkaline eluents containing barium or strontium ions. The addition, in mobile phase, of alkaline-earth divalent cations such as Sr(II) and Ba(II) is shown to be a versatile means of improving the separation of alditols and carbohydrates, which are conventionally determined by high-performance anion-e...

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Fong, C.L.; Chang, K.L., 1962: The spectrographic determination of micro-quantities of calcium, strontium and barium in water and soil extracts.. The procedure makes use of Cu electrodes, a medium dispersion quartz spectrograph and an activated A.C. arc. 300 mg NaCl is added to 25 ml of the test solution as spectrographic buffer, then 1 ml 0.6 nHCl and finally 1 mg Zn (as ZnSO4) are added a...

Ivanova T.I., 1981: Quantitative spectral determination of barium and strontium in rocks. Trudy - Institut Geologii 36: 36-43

G.L.B.ale; K.H.A.yar; P.M.R.R.o; R.C.N.ik, 1978: Spectrographic determination of barium and strontium in geological samples. Analytical and Bioanalytical Chemistry 293(3): 223-224

Smythe, L.E.; Davis, P.S., 1961: Strontium-90 determination on samples (of water, soil, and food) from Lucas Heights and Richmond, New South Wales, 1959-60. Six samples of dried skim-milk from the N.S.W. Milk Board in Feb. 1959-March 1960 contained 2.4-4.4 mu mu c. 90Sr/g. Ca. Values for milk from 2 farms in 1959 were lower, 1.6-2.7 mu mu c.

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