NOPR Collection:
http://nopr.niscpr.res.in/handle/123456789/30992
2026-10-09T22:40:01ZSpectrophotometric determination of mercury (II) with 5-(2'-carboxyphenyl) azo-8-quinolinol
http://nopr.niscpr.res.in/handle/123456789/31216
Title: Spectrophotometric determination of mercury (II) with 5-(2'-carboxyphenyl) azo-8-quinolinol
Authors: Saran, R; Sardana, A K; Ramanaiah, G V
Abstract: <span style="font-size:11.0pt;line-height:
115%;font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;="" mso-fareast-font-family:"times="" new="" roman";mso-fareast-theme-font:minor-fareast;="" mso-hansi-theme-font:minor-latin;mso-bidi-font-family:"times="" roman";="" mso-ansi-language:en-in;mso-fareast-language:en-us;mso-bidi-language:hi"="" lang="EN-IN">5-(2-Carboxyphenyl)azo-8-quinolinol
forms a reddish violet complex with mercury(II) in aqueous medium at <i>p</i>H
4.4-6.5. The 2:1 (ligand to metal) complex is formed instantaneously, remains
stable for at least 20 h and adheres to Beer's law in the range 0.03-0.18 <i>ug
</i>of mercury(II) per mL. The molar absorptivity and Sandell's sensitivity of
the method are 6.05 x 10<sup>4</sup> L mol<sup>-1</sup> cm<sup>-1</sup> and
0.003 <i><span style="font-size:11.0pt;line-height:115%;
font-family:Symbol;mso-fareast-font-family:" times="" new="" roman";mso-fareast-theme-font:="" minor-fareast;mso-bidi-font-family:"times="" roman";mso-ansi-language:en-in;="" mso-fareast-language:en-us;mso-bidi-language:hi"="" lang="EN-IN">m</span></i><span style="font-size:11.0pt;line-height:115%;font-family:" calibri","sans-serif";="" mso-ascii-theme-font:minor-latin;mso-fareast-font-family:"times="" new="" roman";="" mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-latin;="" mso-bidi-font-family:"times="" roman";mso-ansi-language:en-in;mso-fareast-language:="" en-us;mso-bidi-language:hi"="" lang="EN-IN">g<i> </i>cm<sup>-2</sup><span style="font-size:11.0pt;line-height:115%;font-family:" calibri","sans-serif";="" mso-ascii-theme-font:minor-latin;mso-fareast-font-family:"times="" new="" roman";="" mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-latin;="" mso-bidi-font-family:arial;mso-ansi-language:en-in;mso-fareast-language:en-us;="" mso-bidi-language:hi"="" lang="EN-IN">, <span style="font-size:11.0pt;
line-height:115%;font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;="" mso-fareast-font-family:"times="" new="" roman";mso-fareast-theme-font:minor-fareast;="" mso-hansi-theme-font:minor-latin;mso-bidi-font-family:"times="" roman";="" mso-ansi-language:en-in;mso-fareast-language:en-us;mso-bidi-language:hi"="" lang="EN-IN">respectively,
at 555 nm. </span></span></span></span>
Page(s): 258-2591994-07-01T00:00:00ZBeryllium(II)-13X zeolite derivatives for the purpose of environmental control
http://nopr.niscpr.res.in/handle/123456789/31215
Title: Beryllium(II)-13X zeolite derivatives for the purpose of environmental control
Authors: Banerjee, Sari Prasad; Dyer, A; Enarny, H; Williams, C D
Abstract: <span style="font-size:11.0pt;line-height:115%;
font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:"times="" roman";mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">Highly toxic Be(II) ions
have been exchanged for Na(I) ions in l3X synthetic zeolite. The phosphatic
derivative of Be(II)-13X exhibits distinct characteristics of AlPO<sub>4</sub>.
The exchanged, ammoniated and phosphatic derivatives have been investigated by
their thermal behaviour, FT-IR and X-ray diffraction. These studies confirm the
utility of the zeolite in effectively removing Be (II) alongside pollution
causing ammonia and P0<sub>4</sub>(III) species.</span>
Page(s): 254-2571994-07-01T00:00:00ZAn equation for estimating coal conversions using super critical solventst
http://nopr.niscpr.res.in/handle/123456789/31214
Title: An equation for estimating coal conversions using super critical solventst
Authors: Kumari, B Krishna; Sivaji, K; Venugopal, D
Abstract: <span style="font-size:11.0pt;line-height:115%;
font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:"times="" roman";mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">Coal conversions <i><span style="font-size:11.0pt;line-height:115%;font-family:" calibri","sans-serif";="" mso-ascii-theme-font:minor-latin;mso-fareast-font-family:"times="" new="" roman";="" mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-latin;="" mso-bidi-font-family:arial;mso-ansi-language:en-us;mso-fareast-language:en-us;="" mso-bidi-language:ar-sa"="">(Y) </span></i><span style="font-size:11.0pt;
line-height:115%;font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;="" mso-fareast-font-family:"times="" new="" roman";mso-fareast-theme-font:minor-fareast;="" mso-hansi-theme-font:minor-latin;mso-bidi-font-family:"times="" roman";="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">achieved
<span style="font-size:11.0pt;line-height:115%;font-family:" calibri","sans-serif";="" mso-ascii-theme-font:minor-latin;mso-fareast-font-family:"times="" new="" roman";="" mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-latin;="" mso-bidi-font-family:arial;mso-ansi-language:en-us;mso-fareast-language:en-us;="" mso-bidi-language:ar-sa"="">by <span style="font-size:11.0pt;line-height:
115%;font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;="" mso-fareast-font-family:"times="" new="" roman";mso-fareast-theme-font:minor-fareast;="" mso-hansi-theme-font:minor-latin;mso-bidi-font-family:"times="" roman";="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">means
of solvents used under super critical conditions have been correlated to the
extraction conditions, solvent properties and coal characteristics. </span></span></span></span>
Page(s): 251-2531994-07-01T00:00:00ZPreconcentration by coflotation for the polarographic determination of traces of heavy metals in water
http://nopr.niscpr.res.in/handle/123456789/31213
Title: Preconcentration by coflotation for the polarographic determination of traces of heavy metals in water
Authors: Basu, Bharathibai J; Padma, D K; Rajagopalan, S R
Abstract: <span style="font-size:11.0pt;line-height:115%;
font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:"times="" roman";mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">Preconcentration by
coflotation is employed to improve the detection limits for the determination
of parts per billion levels of heavy metal ions such as copper(II), lead(II),
cadmium(II), zinc(II), nickel(II) and cobalt(II) in natural and sea water by
differential pulse polarography (OPP). Trace amounts of these ions in water are
coprecipitated on colloidal aluminium hydroxide and the precipitate is floated
with the aid of sodium oleate and a stream of nitrogen bubbles. Experimental
conditions are optimized to obtain maximum recovery of these ions by coflotation.
The effect of surfactant on the OPP peak currents of these ions in the
supporting electrolyte used in this work is studied.</span>
Page(s): 248-2501994-07-01T00:00:00Z