Authors: El-Sayed, AY Hussein, YZ Mohammed, MA

Citation: Ay. El-sayed et al., Simultaneous determination of phosphate and silicate in detergents and waters by first-derivative spectrophotometry, ANALYST, 126(10), 2001, pp. 1810-1815

Authors: El-Sayed, AY Rashad, RM Aly, SM Zaki, MTM

Citation: Ay. El-sayed et al., Analytical application of a new pyrazolditiocarboxylic acid reagent for determination of Pd(II) and Rh(III), QUIM ANAL, 19(1), 2000, pp. 17-23