REFERENCES
- Marczenko , Z. 1972 . “Spectrophotometric Determination of Elements” , 538 – 545 . Chichester, Sussex, , England : Ellis Harwood Limited .
- Přibil , R. 1972 . “Analytical Application of EDTA and Related Compounds”, , 1st Ed. , 153 Oxford : Pergmanon Press . 173, 244, 245
- West , T. S. 1969 . “Complexometry with EDTA and Related Reagents”, , 3rd Ed. , 208 – 209 . Bournemouth, U. K. : Broglia Press . 218–219
- Hafez , M. A. H. , Kenawy , I. M. M. and Kabil , M. A. 1985 . Anal. Lett. , 18 : 2043
- Hafez , M. A. H. and Emam , M. E. M. 1986 . The Analyst , 111 : 1435
- Hafez , M. A. H. , Abdallah , A. M. A. and Abd El-Gany , N. E. S. 1990 . The Analyst , 115 : 221
- Hafez , M. A. H. , Abdallah , A. M. A. and Wahdan , T. M. A. 1991 . The Analyst , 116 : 663
- Hafez , M. A. H. 1992 . Anal. Lett. , 25 : 1779
- Hafez , M. A. H. 1992 . Talanta , 39 : 1189
- Hafez , M. A. H. , Kenawy , I. M. M. and Ramadan , M. A. M. 1993 . Egypt. J. Anal. Chem. , accepted for publication
- Kankare , J. J. 1970 . Anal. Chem. , 42 : 1322
- Yoshino , T. , Murakami , S. and Kagawa , M. 1974 . Talanta , 21 : 199
- Richard , A. 1987 . “Sample Pretreatment and Separation” , 60 New York : Wiley .
- Vogel , A. I. 1972 . “Text Book of Quantitative Inorganic Analysis” , 3rd Ed. , London : Longman .
- Busev , A. I. , Tiplsova , V. G. and Ivanov , V. M. 1981 . “Analytical Chemistry of Rare Elements” , 114 – 118 . Moscow : Mir Publishers .
- Hafez , M. A. H. , Kenawy , I. M. M. and Ramadan , M. A. M. 1993 . The Analyst accepted for publication
- Wilson , C. L. and Wilson , D. W. 1960 . “Comprehensive Analytical Chemistry” , Vol. IB , 357 Amsterdam, London, New York : Classical Analysis, Elsevier Publishing Company .
- Eckschlager , K. 1969 . “Errors, Measurement and Results in Chemical Analysis” , 86 – 88 . London, New York, Toronto and Melbourne : van Nostrand Reinhold . 110–111, 107, 114
- Miller , J. C. and Miller , J. N. 1986 . “Statistics for Analytical Chemistry” , 1st Ed. , 33 – 34 . England : Ellis Horwood Limited . 54–59
- Kaiser , H. 1965 . Fresenius Z. Anal. Chem. , 209 : 1
- Kaiser , H. 1970 . Fresenius Z. Anal. Chem. , 42 ( 2 ) : 24A