Plasma strontium

Vezzoli et al. (1998) compared the area under the plasma strontium concentration-time curves in adult males and females and found no significant difference (males, 10.6 0.6 mmol/L-minute females,... 

Information on the distribution of strontium in soft tissue is extremely limited. In rats that were exposed to 3. 4 mg strontium/L (as SrCl2) in drinking water for 3 months, the serum concentration of strontium was 8.7 mg/L and tissue serum strontium concentration ratios (based on the latter mean serum concentration) were as follows liver, 0.7 heart, 1.2 muscle, 1.1 adrenal, 1.3 brain, 1.2 and bone, 1,300 (Skoryna 198 lb). Strontiumxalcium ratios in these tissues were approximately 0.05-0.1. Tissue plasma strontium concentration ratios in rats 1-5 hours after they received an intraperitoneal injection of strontium revealed ratios <1 in the fat, spleen, liver, ovary, testis, skeletal muscle, and heart and values of 1.2-1.7 in the lung, small intestine, salivary gland, kidney, and skin (Brues et al. 1969). Tissue plasma concentration ratios of... 

Bames, D.W.H., Bishop, M., Harrison, G.E. and Sutton, A. 1961 Comparison of the plasma concentration and urinary excretion of strontium and calcium in man. InternationalJournal of Radiation Biology 3 637-646. 

The availability of a chemical to the cells is affected by where it is stored. First, lipophilic chemicals tend to get absorbed by and retained in fat cells, from which they are released slowly back into the bloodstream. Second, some chemicals are strongly bound to plasma proteins and are released to the cells more slowly over time. For example, acetaminophen (Tylenol ) does not bind strongly to plasma proteins, while diazepam (Valium ) does. Thus, diazepam will persist in the body for longer periods of time than will acetaminophen. Finally, some elements, such as fluorine, lead, and strontium, are bound up in bone for long periods of time. As bone slowly renews itself or is broken down under special circumstances such as pregnancy, the chemicals are released and can affect the mother and fetus. 

Finally, we note that the photocorrosion process is strongly pH-dependent, occurring most readily in strongly acid solutions, and that the presence of a carboxylic acid is required for the occurrence of severe photocorrosion. In Table II we present analytical results, based on inductively coupled argon plasma (ICP) emission spectroscopy, for representative electrolyte solutions after 6-8 hr. of photo-Kolbe electrolysis with n-SrTiC anodes. It can be seen that the formation of soluble strontium and titanium species is... 

Akcay et al. [215] have shown that extraction of total strontium using an ultrasonic extraction procedure was not as good as was achieved using conventional extraction methods. Further work on the determination of strontium in soil is reported under Multi-Cation Analysis Methods including inductively coupled plasma atomic emission spectrometry (Sect. 2.55), emission spectrometry (Sect. 2.55), stable isotope dilution (2.55), and photon activation analysis (2.55). 

Ultracold neutral plasmas may be produced by laser cooling and trapping of different types of neutral atoms [105] such as calcium, strontium, rubidium, cesium etc., by photoionizing Bose condensates [106] and also by spontaneous ionization of dense Rydberg atoms [107,108]. A review on ultracold neutral plasmas due to Killan et al. [61] gives an excellent disposition on the subject. 

Olehy DA, Schmitt RA, Bethard WF. 1966. Neutron activation analysis of magnesium, calcium, strontium, barium, manganese, cobalt, copper, zinc, sodium, and potassium in human erythrocytes and plasma. J Nucl Med 6 917-927. 

M. Barbaste, K. Robinson, S. Guilfoyle, B. Medina, R. Lobinski, Precise determination of the strontium isotope ratios in wine by inductively coupled plasma sector field multicollector mass spectrometry (ICP-SF-MC-MS), J. Anal. Atom. Spectrom., 17... 

Plasma Concentrations of Calcium and Phosphate Although the mean response to changes in plasma cedcium is a chemge in the secretion of peuathyroid hormone, the activity of calcidiol 1-hydroxyleise in kidney slices is decreased directly by high concentrations of cedcium in the incubation medium. Cedcium heis no direct effect on the activity of calcidiol 24-hydroxylase under these conditions. Strontium and cadmium edso inhibit ctdcidiol 1-hydroxylase. 

Strontium levels are increased in plasma of renal failure patients. In dialysis patients the accumulation of the element has been reported to be strongly centre and country-dependent and values up to 50 times those noted in subjects with normal renal function have been reported within the latter population [20]. In addition to the renal failure, accumulation of the element turned out to be due to the use of strontium-contaminated dialysis fluids secondary to the addition of contaminated acetate-based concentrates. To which other factors such as age, medication, treatment modalities etc. .. also contribute to the increased levels is not yet fully understood. 

Mauras Y, KS Ang KS, P Simon P, B Tessier B, F Cartier F, P Allain P. Increase in blood plasma levels of boron and strontium in hemodialyzed patients. Clin ChimActa 1986 156 315-320. 

This chapter discusses the advantages and limitations of the multielement analysis of biologically related samples using induction-coupled plasma optical emission. The sample categories covered include grains, feeds, fish, bovine liver, orchard leaves, and human kidney stones. These materials have been simultaneously analyzed for copper, nickel, vanadium, chromium, phosphorus, cobalt, lead, potassium, zinc, manganese, iron, strontium, sodium, aluminum, calcium, magnesium, silicon, boron, and beryllium, often with limited amounts of sample. 

Garbarino, J. R., 1999, Methods of Analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of Dissolved Arsenic, Boron, Lithium, Selenium, Strontium, Thallium, and Vanadium Using Inductively Coupled Plasma-Mass Spectrometry U.S. Geological Survery Open-File Report 99-093, 31 p. 

Spreadsheet Summary In Chapter 4 of Applications of Microsoft Excel in Analytical Chemistiy, a multiple standard additions procedure is illustrated. The determination of strontium in sea water with inductively coupled plasma atomic emission spectrometry is used as an example. The worksheet is prepared, and the standard additions plot is made. The unknown Sr concentration and its standard deviation are obtained. 

The transport of Sr - ions across the membrane was also monitored by the addition of inactive strontium at a concentration of 5 mg/mL as a carrier in the feed compartment. Samples from the receiver compartment were drawn at regular intervals, and the Sr concentrations were determined using the inductively coupled plasma atomic emission spectrophotometry (ICP-AES) method. 

Radioactive Strontium. Exposure to excessive ionizing radiation is known to affect the integrity of the vasculature of the skin, increasing the permeability of the vasculature to plasma protein. A study by Song et al. (1968) examined the ability of several anti-inflammatory agents to suppress this radiation-induced... 

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