Patterson, C.C. and Settle, D.M. (1975) The Reduction of Orders of Magnitude Errors in Lead Analysis of Biological Materials and Natural Waters by Evaluation and Controlling the Extent and Sources of Industrial Lead Concentration Introduces during Sample Collecting Handling and Analysis. Proceedings of the 7th IMR Symposium, Gaithersburg, 7-11 October 1974.

has been cited by the following article:

• TITLE: Nutrient Fluxes and Sediments Composition in El Mex Bay and Surround Drains, Alexandria, Egypt

  AUTHORS: Mohamed Attia Shreadah, Mamdouh Saad Masoud, Abdel-Rhman Mosaad Khattab, Gehan Mohamed El Zokm

  KEYWORDS: Nutrient Fluxes, IR-X-Ray-DTA, Sediments, El Mex Bay, Alexandria, Egypt

  JOURNAL NAME: American Journal of Analytical Chemistry, Vol.6 No.6, May 8, 2015

  ABSTRACT: The regeneration of pore water (PW) nutrients was investigated and the contribution of benthic nutrient fluxes to the overlying bottom water (BW) was examined. Dissolved inorganic nutrients (NO-2, NO-3, PO3-4 and SIO4-4) were measured in PW and BW in El Mex Bay and surround drains during spring 2010. Nutrient concentrations gradiance in PW with overlying seawater were evaluated according to Fick’s Law. Average inorganic nutrient fluxes were estimated using the pore water gradient concentration across the sediment-water interface. Calculated nutrient fluxes had averages of ﹣7.24, ﹣1.36, ﹣7.86 and ﹣1.33 in El Mex Bay. Additionally, the fluxes in the drains were ﹣34.39, ﹣32.28, ﹣53.20 and ﹣117.6 mg·m﹣2·day﹣1 for NO-3, NO-2, PO3-4 and SIO4-4, respectively. Mineralogical studies of sediment samples by using IR, X-ray analysis were carried out to identify the chemical structure of sediments. The results revealed that calcite, aragonite and quartz are the dominant minerals. On the other hand, differential thermal analysis (DTA) was used to evaluate and discuss different kinetic parameters such as Ea#, ΔG#, ΔH#, ΔS#, Z and Tm support the view of the extra stability of these sediments.