Pilot Study of the Analytical Performance of the Pulsed Hollow Cathode Discharge Emission Source

1995 ◽  
Vol 49 (7) ◽  
pp. 890-899 ◽  
Author(s):  
Xiangjun Cai ◽  
J. C. Williams
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Hollow Cathode ◽  
Hollow Cathode Discharge ◽  
Analytical Performance ◽  
Pulsed Discharge ◽  
Stainless Steel Cathode ◽  
Steel Cathode ◽  
Discharge Method ◽  
Scanning Electron

Proper conditioning of the hollow cathode by sputtering is critical to the analytical performance of the hollow cathode. A pulsed discharge procedure was developed to condition the 1.5- × 5-mm stainless steel cathode. A scanning electron microscope was used to study the surface structure resulting from the conditioning. The resulting hollow bottom was bulb-shaped and the surface was mirror-like, very smooth, and shiny. The emission intensities from smooth cathodes were greater that those from the rough ones. The precision obtained here was 3–5% for Na, 5–8% for Li, and 4–10% for K. Three working curves for each element were made on different days with different cathodes that had been conditioned in the same manner for 4 h by sputtering. The three working curves virtually coincided when plotted in the same figure, demonstrating the precision and reproducibility from day to day of the hollow cathode discharge method as developed in this laboratory. The 3-σ detection limits calculated from slopes of working curves are 0.32 pg, 0.35 pg, and 3.2 pg for Na, Li, and K, respectively.

Microscopic Study of Smooth Silver-plated Retention Pins in Amalgam

1980 ◽  
Vol 59 (2) ◽  
pp. 124-128 ◽  
Author(s):  
Y. Galindo ◽  
K. McLachlan ◽  
Z. Kasloff
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Microscopic Study ◽  
Strong Evidence ◽  
Mechanical Performance ◽  
Silver Layer ◽  
Mechanical Bonding ◽  
Bonding Characteristics ◽  
Scanning Electron

A silver-plating technique was developed in an effort to produce good mechanical bonding characteristics between stainless steelpins and amalgam. Metallographic microscope and scanning electron microscope (SEM) studies were made to assess the presence, or otherwise, of such a bond between (a) the silver layer plating and the surface of the stainless steel pins, and (b) and silver plating and the amalgam. Unplated stainless steel and sterling silver pins were used as a control and as a comparison, respectively. A "rubbing" technique of condensation was devised to closely adapt amalgam to the pins. It is concluded that there is strong evidence for the existence of a good bond between the plated pins and amalgam. The mechanical performance of the bond is discussed elsewhere. 1.

A Study on the Optimization of Solvent Debinding Process for Powder Injection Molded 316L Stainless Steel Parts

2016 ◽  
Vol 1133 ◽  
pp. 324-328 ◽  
Author(s):  
Muhammad Aslam ◽  
Faiz Ahmad ◽  
P.S.M. Bm-Yousoff ◽  
Khurram Altaf ◽  
Afian Omar ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
316L Stainless Steel ◽  
Research Work ◽  
Powder Injection ◽  
Blade Mixer ◽  
Injection Molded ◽  
Debinding Process ◽  
Scanning Electron

Optimization of solvent debinding process parameters for powder injection molded 316L stainless steel (SS) has been reported in this research work. Powder gas atomized (PGA) 316L SS was blended with a multicomponent binder in Z-blade mixer at 170°C ± 5°C for 90 minutes. Feedstock was successfully injected at temperature 170 ± 5°C. Injection molded samples were immersed in n-heptane for 2h, 4h, 6h and 8h at temperatures 50°C ,55°C and 60°C to extract the soluble binder components. Scanning electron microscope (SEM) results attested that soluble binder components were completely extracted from injection molded samples at temperature 55°C after 6h.

scholarly journals SELECTIVE ATENOLOL DETERMINATION IN BLOOD USING MOLECULAR IMPRINTED POLYMER WITH ITACONIC ACID AS FUNCTIONAL MONOMER

2019 ◽  
Vol 11 (1) ◽  
pp. 136
Author(s):  
Aliya Nur Hasanah ◽  
Asri Budi Yulianti ◽  
Driyanti Rahayu
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Itaconic Acid ◽  
Solid Phase ◽  
Bulk Polymerization ◽  
Analytical Performance ◽  
Functional Monomer ◽  
Physical Character ◽  
Recovery Percentage ◽  
Scanning Electron

Objective: This study was aimed to determine analytical performance and physical character of MI-SPE (Molecular Imprinted Solid Phase Extraction) atenolol using itaconic acid as the functional monomer and to implement the material for the extraction of atenolol in blood serum.Methods: This experiment was performed by determining association constants between monomer-template with UV-Vis spectrophotometer, the synthesis of MI-SPE atenolol using bulk polymerization method, template extraction, evaluation of the adsorption ability and capacity of sorbent, evaluation of sorbent selectivity, and determining their physical character using Fourier Transform Infrared (FTIR) and Scanning Electron Microscope (SEM). In the end, the sorbent then was implemented to extract atenolol in blood serum.Results: Analytical performance showed that MI-SPE sorbent has Imprinting Factor (IF) 10.632 which is the largest number compared to IF when using another beta blocker compound. Physical characterization obtained by MI-SPE using Scanning Electron Microscope (SEM) method showed that MI-SPE morphology has homogeneous pore and number of cavities than its blank. MI-SPE has recovery percentage 92.22 % atenolol when it applied to blood serum spiked with atenolol standard.Conclusion: MI-SPE sorbent made from the itaconic acid monomer in methanol porogen potential to be used for the extraction of atenolol from the blood sample by selectively bind to atenolol.

scholarly journals Combining phosphate species and stainless steel cathode to enhance hydrogen evolution in microbial electrolysis cell (MEC)

2010 ◽  
Vol 12 (2) ◽  
pp. 183-186 ◽  
Author(s):  
Leonardo DeSilva Munoz ◽  
Benjamin Erable ◽  
Luc Etcheverry ◽  
Julien Riess ◽  
Régine Basséguy ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Hydrogen Evolution ◽  
Electrolysis Cell ◽  
Microbial Electrolysis Cell ◽  
Stainless Steel Cathode ◽  
Phosphate Species ◽  
Steel Cathode ◽  
Microbial Electrolysis

scholarly journals Study on the Effect of Electrochemical Dechlorination Reduction of Hexachlorobenzene Using Different Cathodes

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Yingru Wang ◽  
Xiaohua Lu
Keyword(s):  
Gas Chromatography ◽  
Stainless Steel ◽  
Cathode Materials ◽  
Aromatic Compounds ◽  
Reductive Dechlorination ◽  
Electrochemical Method ◽  
Organic Pollutant ◽  
Stainless Steel Cathode ◽  
Reductive Process ◽  
Steel Cathode

Hexachlorobenzene (HCB) is a persistent organic pollutant and poses great threat on ecosystem and human health. In order to investigate the degradation law of HCB, a RuO2/Ti material was used as the anode, meanwhile, zinc, stainless steel, graphite, and RuO2/Ti were used as the cathode, respectively. The gas chromatography (GC) was used to analyze the electrochemical products of HCB on different cathodes. The results showed that the cathode materials significantly affected the dechlorination efficiency of HCB, and the degradation of HCB was reductive dechlorination which occurred only on the cathode. During the reductive process, chlorine atoms were replaced one by one on various intermediates such as pentachlorobenzene, tetrachlorobenzene, and trichlorobenzene occurred; the trichlorobenzene was obtained when zinc was used as cathode. The rapid dechlorination of HCB suggested that the electrochemical method using zinc or stainless steel as cathode could be used for remediation of polychlorinated aromatic compounds in the environment. The dechlorination approach of HCB by stainless steel cathode could be proposed.

Sign in / Sign up

Export Citation Format

Share Document