A New Very Sensitive and Selective Spot Test for Mercury

A sensitive and selective test for the detection of mercury has been developed based on the strong catalytic action of mercuric ions on the decomposition of hexacyanoferrate (II) in the presence of nitrosobenzene. The sensitivity for the pure system expressed as limit of identification (in 0.05 ml.) is 0.002 microgram of mercury at a limiting concentration o f 1 to 25,000.000. Of the cations studied only silver and gold give an analogous reaction. By following an appropriate procedure, mercury can be detected even when it is present in mixtures with cations giving coloured precipitates with the hexacyanoferrnte (II)

Photometric Determination of Microquantities of Cyanides

The catalytic action of mercuric ions upon the reaction of potassium ferrocyanide and nitrosobenzene is strongly inhibited by even small concentrations of cyanide ions. The progress of the inhibitive effect may be observed by measuring the extinction of the violet reaction product [Fe(CN)5NOPh)3. A method for the quantitative photometric determination of microquantities of cyanides has been developed. The coefficient of variation for a concentration of 1x10-5 - 8x10-5 M /l of cyanide ion is shown to be 1.0 - 6.3%

A New Very Sensitive and Selective Spot Test for Mercury

A sensitive and selective test for the detection of mercury has been developed based on the strong catalytic action of mercuric ions on the decomposition of hexacyanoferrate (II) in the presence of nitrosobenzene. The sensitivity for the pure system expressed as limit of identification (in 0.05 ml.) is 0.002 microgram of mercury at a limiting concentration o f 1 to 25,000.000. Of the cations studied only silver and gold give an analogous reaction. By following an appropriate procedure, mercury can be detected even when it is present in mixtures with cations giving coloured precipitates with the hexacyanoferrnte (II)

Formulation and Comparison of Experimental based Mathematical Model with Artificial Neural Network Simulation on Surface Roughness with Burnished Spherical Surface Tool on Aluminum Alloy6351

This paper deals with the effect of burnishing process on the Aluminum Alloy material 6351(HE 15) using Lathe. Surface roughness generated after the turning operation was used to ball burnishing. The surface roughness pattern which was further used to simulate ball burnishing process using ANN. Improvement in the surface roughness values achieved for tool steel after ball burnishing process was 98.2429%

Surprising applications and possible extensions of Dellsarte's method

Paper presented at Strathmore International Math Research Conference on July 23 - 27, 2012This is a short informal survey on some surprising applications of Delsarte's method, written for anyone being interested. I try to keep it as short and as informative as possibleThis is a short informal survey on some surprising applications of Delsarte's method, written for anyone being interested. I try to keep it as short and as informative as possibl