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	1.	Titrimetric determination of some N-substituted phenothiazine derivatives. [electronic resource] by Walash, M I Rizk, M Abou-Ouf, A M Belal, F Producer: 19830826 In: The Analyst vol. 108 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	Spectrophotometric determination of piperazine and its salts in pharmaceuticals. [electronic resource] by Abou-Ouf, A M Walash, M I Rizk, M S Ibrahim, F A Producer: 19800426 In: Journal - Association of Official Analytical Chemists vol. 62 Availability: No items available. Save to lists Add to cart (remove)
	3.	Colorimetric determination of certain phenol derivatives in pharmaceutical preparations. [electronic resource] by Hassan, S M Walash, M I El-Sayed, S M Abou Ouf, A M Producer: 19820222 In: Journal - Association of Official Analytical Chemists vol. 64 Availability: No items available. Save to lists Add to cart (remove)

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