β Scribed by A.A. Abd El Raheem; Abdel-Aziz Amin
No coin nor oath required. For personal study only.
The use of complexrng agents to mask interference in the gravimetric determination of palladium has been studied. Ethylenediaminetetraacctic acid was used to complex intorfcring ions in the determination of palladium with dimethylglyoxime, and nitrilotriacetic acid has beon cmploycd as a masking agent in the determination of palladium with quinaldic acid. From 15 to 150 mg of palladium wero determined. All the metals tested do not interfere with the exception of gold which IS reduced by the complexing agents and has to be removed prior to the determination. The procedures are rapid, simple and accurate.
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REAGENT PART III. A NEW INDICATOR FOR TITRATIONS WITH VERY DILUTE CERIC SULI'HATE SOLUTIONS I,El< lCUhI-'l-h'l"r Ccric sulphatc has long been rccogniscd as a convenient reagent for the volumetric determination of iron(I1) and arsenic(II1). Ferroin and N-phenylanthranilic acid are the two most common
## Abstract A sensitive silver staining method using eriochrome blackβ T as a silverβion sensitizer for DNA detection in polyacrylamide gels was developed. The sensitivity of this staining method was significantly improved by the new silverβion sensitizer containing a diazo group, which has reducing