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The Effect of pretreatment and time of Storage on the determination of selenium by AAS in tissues of patients with breast tumors. | ||
| Iraqi National Journal Of Chemistry | ||
| Article 1, Volume 0, Issue 17, 2014, Pages 10-18 | ||
| Authors | ||
| Mohammed A . AL.Hamdany; ; ; Yusra A.AL kaliq; Rafa K. AL-Kubaisy; Samera H . Hamad | ||
| Abstract | ||
| Abstract This study involves an investigation on the effect of pretreatment using many acids or their mixtures on the determination of selenium in a standard reference material of tissue. The mixture (HClO4: H2O2) (1:1) gave the best accuracy in the determination of selenium concentration in the standard sample, the optimum conditions for the other parameters (Temperature & time of storage of the tissue in solutions (formalin & normal saline) were also evaluated. The standard calibration curve revealed a straight line and high sensitivity indicated by detection limit (DL=0.3 X 10-3 ug / ml. ) and % recovery = 96.2 . Selenium can be measured in tissue samples which kept in formalin up to 6 days for both Benign & malignant tissues . But, in normal saline up to 4 days in both benign & malignant tissues can be tolerated . Higher values for selenium concentration in malignant tissue compared with benign tissue are found . In the other hand lower values for selenium concentration in sera samples of patients with breast cancer are noticed | ||
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