scholarly journals Improvement of the quality of analytical control of metallurgical products as a means of uncertainty

2020 ◽  
Vol 130 (1) ◽  
pp. 11-17
Author(s):  
R.A. Aubakirova ◽  
◽  
E.N. Ivashchenko ◽  
B.S. Saurbaeva ◽  
G.K. Daumova ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
High Selectivity ◽  
Atomic Emission ◽  
Analytical Control ◽  
Inductively Coupled ◽  
Atomic Spectral Analysis ◽  
Physical And Chemical ◽  
Instrumental Methods ◽  
Analytical Laboratories

The entire technological process, starting from ore mining to ending with the release of finished products, it is closely connected with the analytical control of each stage. Currently, the practice of analytical laboratories of large metallurgical enterprises, which include the Oskemen Metallurgical Complex LLP "Kazzinc", has firmly entered the physical and chemical or instrumental methods. These methods, which are characterized by rapidity, high selectivity and the ability to simultaneously determine several components, have replaced in most cases chemical ones. The article presents experimental data on the analysis of dump slag - the waste from metallurgical production of the Oskemen Metallurgical Complex LLP "Kazzinc"- by atomic emission method with inductively coupled plasma. Atomic spectral analysis are used in mining and geology, metallurgy, metalworking and chemical industries, etc. The analysis results were processed from the standpoint of the concept of uncertainty, which is very relevant in the practice of the analytical laboratory.

DETERMINATION OF TITANIUM AND ZIRCONIUM IN ALUMINUM ALLOYS BY ATOMIC EMISSION SPECTROMETRY WITH INDUCTIVELY COUPLED PLASMA

2021 ◽  
pp. 108-116
Author(s):  
F.N. Karachevtsev ◽  
◽  
R.M. Dvoretskov ◽  
T.N. Zagvozdkina ◽  
А.V. Slavin ◽  
...  
Keyword(s):  
Aluminum Alloys ◽  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Atomic Emission Spectrometry ◽  
Emission Spectrometry ◽  
Analytical Control ◽  
Plasma Atomic Emission Spectrometry ◽  
Inductively Coupled ◽  
Selection Of

A method is proposed for the determination of titanium and zirconium by inductively coupled plasma atomic emission spectrometry in aluminum alloys. Analytical lines of titanium and zirconium free from other elements significant spectral overlaps are selected. The selection of the sample preparation method was carried out, namely – dissolution in concentrated nitric acid. Studies of the metrological characteristics of the technique were carried out: for titanium and zirconium contents from 0.05 to 0.3 % of the mass. the accuracy index is no more than 5 % rel., which fully ensures the possibility of analytical control of the content of titanium and zirconium in products from aluminum alloys.

Development of the methods for determination of Ag, Cu, Fe, Zn contents in medical materials based on calcium phosphate

2021 ◽  
Vol 4 ◽  
pp. 67-73
Author(s):  
V. A. Volchenkova ◽  
◽  
E. K. Kazenas ◽  
N. A. Andreeva ◽  
T. N. Penkina ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Inductively Coupled Plasma ◽  
Calcium Phosphates ◽  
Atomic Emission ◽  
Analytical Control ◽  
Emission Analysis ◽  
Inductively Coupled ◽  
Relative Standard ◽  
The Matrix ◽  
Medical Materials

Using atomic-emission analysis with inductively coupled plasma (AES – ICP) and atomic absorption spectroscopy (AAS) were developed methods, which allow rapidly, with good metrological characteristics without prior separation of the matrix and without the use of standard composition samples to determine impurity elements (Ag, Cu, Fe, Zn) of concentrations from 0.0005 to 10 % in medical materials based on calcium phosphate. The relative standard deviation (Sr) is 0.05 – 0.005 at the elements contents from 1 to 10 % and does not exceed 0.15 at the elements contents from 0.0005 to 0.1 %. New analytical control methods have provided research on the development of medical composite materials based on substituted calcium phosphates exhibiting antibacterial activity.

Rapid Catalyst Capture Enables Metal-Free Parahydrogen-Based Hyperpolarized Contrast Agents

2018 ◽  
Author(s):  
Danila Barskiy ◽  
Lucia Ke ◽  
Xingyang Li ◽  
Vincent Stevenson ◽  
Nevin Widarman ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Contrast Agents ◽  
Inductively Coupled Plasma ◽  
Organometallic Compounds ◽  
Atomic Emission ◽  
Platinum Group Metals ◽  
Resonance Spectroscopy ◽  
Plasma Atomic Emission ◽  
Inductively Coupled

<p>Hyperpolarization techniques based on the use of parahydrogen provide orders of magnitude signal enhancement for magnetic resonance spectroscopy and imaging. The main drawback limiting widespread applicability of parahydrogen-based techniques in biomedicine is the presence of organometallic compounds (the polarization transfer catalysts) in solution with hyperpolarized contrast agents. These catalysts are typically complexes of platinum-group metals and their administration in vivo should be avoided.</p> <p><br></p><p>Herein, we show how extraction of a hyperpolarized compound from an organic phase to an aqueous phase combined with a rapid (less than 10 seconds) Ir-based catalyst capture by metal scavenging agents can produce pure parahydrogen-based hyperpolarized contrast agents as demonstrated by high-resolution nuclear magnetic resonance (NMR) spectroscopy and inductively coupled plasma atomic emission spectroscopy (ICP-AES). The presented methodology enables fast and efficient means of producing pure hyperpolarized aqueous solutions for biomedical and other uses.</p>

Rapid Catalyst Capture Enables Metal-Free Parahydrogen-Based Hyperpolarized Contrast Agents

2018 ◽  
Author(s):  
Danila Barskiy ◽  
Lucia Ke ◽  
Xingyang Li ◽  
Vincent Stevenson ◽  
Nevin Widarman ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Contrast Agents ◽  
Inductively Coupled Plasma ◽  
Organometallic Compounds ◽  
Atomic Emission ◽  
Platinum Group Metals ◽  
Resonance Spectroscopy ◽  
Plasma Atomic Emission ◽  
Inductively Coupled

<p>Hyperpolarization techniques based on the use of parahydrogen provide orders of magnitude signal enhancement for magnetic resonance spectroscopy and imaging. The main drawback limiting widespread applicability of parahydrogen-based techniques in biomedicine is the presence of organometallic compounds (the polarization transfer catalysts) in solution with hyperpolarized contrast agents. These catalysts are typically complexes of platinum-group metals and their administration in vivo should be avoided.</p> <p><br></p><p>Herein, we show how extraction of a hyperpolarized compound from an organic phase to an aqueous phase combined with a rapid (less than 10 seconds) Ir-based catalyst capture by metal scavenging agents can produce pure parahydrogen-based hyperpolarized contrast agents as demonstrated by high-resolution nuclear magnetic resonance (NMR) spectroscopy and inductively coupled plasma atomic emission spectroscopy (ICP-AES). The presented methodology enables fast and efficient means of producing pure hyperpolarized aqueous solutions for biomedical and other uses.</p>

Sign in / Sign up

Export Citation Format

Share Document