Rapid determination of persulphate in aqueous solutions by visible spectrophotometry

AbstractIn the last decade, different methods have been developed for the determination of chromium(VI) concentration in water. These methods use high cost equipment or they require a long preparation time. Because of their drawbacks, this paper describes an on-line, rapid and sensitive procedure for the determination of Cr(VI) concentrations in aqueous solutions via pH and absorption measurements. Only four Cr(VI) species are considered. The effects of pH and of total amount of chromium on the Cr(VI) speciation are investigated. The molar absorptivities of four chromium species at 371 nm are determined by minimising an objective function. The knowledge of these molar absorptivities and the measurements of pH and absorption at 371 nm lead to a rapid determination of total Cr(VI) concentration. The reliability and applicability of the method were confirmed using synthetic water samples.

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Rapid determination of surfactant critical micelle concentration in aqueous solutions using fiber-optic refractive index sensing

Analytical Biochemistry ◽

10.1016/j.ab.2010.02.021 ◽

2010 ◽

Vol 401 (1) ◽

pp. 144-147 ◽

Cited By ~ 53

Author(s):

Chun Hua Tan ◽

Zhen Jian Huang ◽

Xu Guang Huang

Keyword(s):

Refractive Index ◽

Critical Micelle Concentration ◽

Aqueous Solutions ◽

Fiber Optic ◽

Rapid Determination ◽

Refractive Index Sensing

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A Novel Method for the Rapid Determination of Isonicotinic Hydrazide in Aqueous Solutions Using Reflectance Spectrophotometry and Colorimetry

Journal of Analytical Chemistry ◽

10.1134/s1061934818030139 ◽

2018 ◽

Vol 73 (3) ◽

pp. 236-242 ◽

Cited By ~ 1

Author(s):

L. V. Zrelova ◽

E. I. Belyaeva ◽

D. Yu. Marchenko ◽

E. A. Ivanova ◽

D. A. Sandzhieva ◽

...

Keyword(s):

Aqueous Solutions ◽

Rapid Determination ◽

Reflectance Spectrophotometry ◽

Novel Method ◽

Isonicotinic Hydrazide

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Rapid Determination of Crocetin Esters and Picrocrocin from Saffron Spice (Crocus sativus L.) Using UV–Visible Spectrophotometry for Quality Control

Journal of Agricultural and Food Chemistry ◽

10.1021/jf703725e ◽

2008 ◽

Vol 56 (9) ◽

pp. 3167-3175 ◽

Cited By ~ 52

Author(s):

Ana M. Sánchez ◽

Manuel Carmona ◽

Amaya Zalacain ◽

José M. Carot ◽

José M. Jabaloyes ◽

...

Keyword(s):

Quality Control ◽

Rapid Determination ◽

Crocus Sativus ◽

Visible Spectrophotometry ◽

Uv Visible ◽

Crocus Sativus L

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Weak Beam Imaging and Diffraction Studies of Stacking Faults in Silicon

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100092918 ◽

1976 ◽

Vol 34 ◽

pp. 590-591

Author(s):

T. Y. Tan ◽

W. K. Tice

Keyword(s):

Fast Neutron ◽

Rapid Determination ◽

Stacking Faults ◽

Imaging Method ◽

Large Reduction ◽

Dislocation Loops ◽

Fringe Spacing ◽

Weak Beam ◽

Kinematical Theory

In studying ion implanted semiconductors and fast neutron irradiated metals, the need for characterizing small dislocation loops having diameters of a few hundred angstrom units usually arises. The weak beam imaging method is a powerful technique for analyzing these loops. Because of the large reduction in stacking fault (SF) fringe spacing at large sg, this method allows for a rapid determination of whether the loop is faulted, and, hence, whether it is a perfect or a Frank partial loop. This method was first used by Bicknell to image small faulted loops in boron implanted silicon. He explained the fringe spacing by kinematical theory, i.e., ≃l/(Sg) in the fault fringe in depth oscillation. The fault image contrast formation mechanism is, however, really more complicated.

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