The polarographic determination of indium in zinc-base alloys : The determination of indium in zinc and in zinc alloys of low aluminium content

Studies of the application of an 8-hydroxyquinoline extraction and of a zinc oxide “collection” procedure for the separation of trace amounts of indium from zinc alloys are described and discussed. A combination of radio-chemical and polarographic determination were employed for this work. A polarographic method for the determination of indium in zinc and in zinc alloys of low aluminium content is presented     

The polarographic behaviour of some elements in concentrated calcium chloride solution: The determination of chromium in the presence of nickel

Further studies on the polarography of trivalent chromium in concentrated calcium chloride solution are described. Details are given of a chloride-hydroxylamine base electrolyte (7.4M with respect to chloride) in which chromium may be determined directly in the presence of nickel. This method is not applicable if the nickel-chromium ratio is large. Results are presented and certain theoretical aspects are discussed.     

The polarographic determination of indium in zinc-base alloys : The determination of indium in mazak alloys

In this paper, the development of a co-precipitation method for the separation of indium from zinc alloys is described and a method for the determination of indium down to 0.5 p.p.m. in mazak alloys is presented. Results obtained in trials of this method are given and the final conclusions regarding this and previously developed methods are included.     

The polarographic behaviour of some elements in concentrated calcium chloride solution : The polography of chromium,nickle and lead

This paper discusses in detail the polarography of chromium, nickel and lead in 5M calcium chloride. The conditions for polarography are laid down and the theoretical aspects of the results obtained with a single-sweep cathode ray polarograph are discussed. The mutual interference of the elements is detailed and recommendations for their determination in the presence of one another are presented.     

The polarographic determination of indium in zinc-base alloys : General introduction. the application of the linear sweep cathode ray polarograph

The problems relating to the polarographic determination of trace amounts of indium in zinc and zinc-base alloys, especially mazak, are discussed and literature relating to the extraction and polarography of indium is briefly summarised. A method for the determination of indium using the linear-sweep cathode ray polarograph is presented and certain aspects are discussed.     

High precision comparative polarography

A new cell assembly for use with the differential cathode ray polarograph is described togother with full practical details of its use in comparative polaragraphy. The difficulties of manipulating the cells and dropping mercury electrodes have been greatly reduced. Results obtained show that the coefficient of variation of a polarographic determination can be as low as 0.04%. Some general aspects of the technique are discussed.     

The determination of the number of electrons involved in irreversible reductions by microcoulometry

A coulometric method of determining the number of electrons taking part in a unit of reaction at the dropping mercury electrode, using only a polarograph and microcell is presented and critically examined. Results obtained with reversible and irreversible depositions and valency changes are discussed and recommendations are made.     

Combined fit to BABAR and Belle Data on e^＋e^- →φπ^＋π^- and φf0（980）

A combined fit is performed to the BABAR and Belle measurements of the e^＋e^- →φπ^＋π^- and φf0（980） cross sections for center-of-mass energy between threshold and 3.0 GeV. The resonance parameters of the φ（1680） and Y（2175） are determined. The mass is （1681-12^＋10） MeV/c^2 and the width is （221-24^＋34） MeV/c^2 for the φ（1680）, and the mass is （2117-49^＋59） MeV/c^2 and the width is （164-80^＋69） MeV/c^2 for the Y（2175）. This information will shed light on the understanding of the nature of the excited φ and Y states observed in e＋e- annihilation.     

Potentialities of infrared spectroscopy in determining traces of carbon or oxygen as carbon dioxide

The determination of traces of carbon dioxide by infrared spectroscopy has been investigated. For maximum sensitivity the absorption band at 2350 cm(-1) is measured, the total pressure being raised to one atmosphere by addition of an inert gas. With a micro gas-cell and a beam-condenser the limit of detection is 0.02 mug of carbon, and for 4, mug of carbon the coefficient of variation is 1.5%.