scholarly journals Use of Total Organic Carbon Analysis and Fourier-Transform Infrared Spectroscopy to Determine Residues of Cleaning Agents on Surfaces

1997 ◽  
Vol 80 (5) ◽  
pp. 1078-1083 ◽  
Author(s):  
Christopher E Biwald ◽  
Walter K Gavlick
Keyword(s):  
Stainless Steel ◽  
Fourier Transform ◽  
Organic Carbon ◽  
Total Organic Carbon ◽  
Steel Surface ◽  
Fourier Transform Infrared ◽  
Stainless Steel Surface ◽  
Organic Residue ◽  
Cleaning Agent ◽  
Cleaning Agents

Abstract Total organic carbon (TOC) analysis can be used in many cases as a nonspecific method of determining trace levels of organic residue on manufacturing equipment before and after cleaning. In this study, a swab sampling method followed by TOC analysis is used to determine organic residue levels associated with alkaline and acidic cleaning agents on a stainless steel surface. The alkaline cleaning agent was nonvolatile, resulting in favorable TOC analysis and validation. The acidic cleaning agent was very volatile, requiring more skilled sample handling and resulting in a more difficult validation. Fourier-transform infrared (FTIR) spectroscopy with a grazing-angle sample attachment can be used for direct surface measurements of cleaning-agent residues on a stainless steel surface. FTIR spectroscopic studies complement and support the TOC studies. One band chosen for each cleaning agent was monitored throughout the leaning process. cidic and alkaline

scholarly journals A Facile Method to Prepare a Hydrophilic/Hydrophobic Metal Surface by Peptide

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1289
Author(s):  
Chunying Ma ◽  
Chengqing Yuan ◽  
Pan Cao
Keyword(s):  
Stainless Steel ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Surface Morphology ◽  
Fourier Transform Infrared Spectroscopy ◽  
Metal Surface ◽  
Metal Binding ◽  
Steel Surface ◽  
Stainless Steel Surface ◽  
Binding Peptide

A facile method to prepare a hydrophilic/hydrophobic metal surface by metal-binding peptide was proposed in this article. Metal-binding peptide sequenced NLNPNTASAMHV was taken as the target peptide to interact with stainless steel. The surface morphology, roughness and Fourier-Transform Infrared spectroscopy (FTIR) showed that some changes occurred on the modified stainless steel surface. Not only were the surfaces coarser but also some organic groups appeared on the modified sample surfaces. By comparing the CAs of all the samples, the most suitable concentration of peptide and treating time were determined. A new and facile way to endow some metals surfaces with hydrophobicity or hydrophilicity has been developed, which is useful especially for antibiofouling.

Behavior of dimethyl ether on the stainless steel surface: in situ high-temperature infrared Fourier-transform spectroscopy

2015 ◽  
Vol 55 (8) ◽  
pp. 663-666 ◽  
Author(s):  
G. N. Bondarenko ◽  
A. S. Rodionov ◽  
E. A. Volnina ◽  
M. A. Kipnis ◽  
S. N. Khadzhiev
Keyword(s):  
Stainless Steel ◽  
Fourier Transform ◽  
High Temperature ◽  
Dimethyl Ether ◽  
Steel Surface ◽  
Fourier Transform Spectroscopy ◽  
Stainless Steel Surface

scholarly journals Study on the effect of Weber Number to heat transfer of multiple droplets on hot stainless steel surface

2018 ◽  
Vol 154 ◽  
pp. 01114 ◽  
Author(s):  
Aria Riswanda ◽  
Indro Pranoto ◽  
Deendarlianto ◽  
Indarto ◽  
Teguh Wibowo
Keyword(s):  
Stainless Steel ◽  
Surface Temperature ◽  
Weber Number ◽  
Steel Surface ◽  
Cooling System ◽  
Spray Cooling ◽  
Stainless Steel Surface ◽  
Temperature Decrease ◽  
Evaporation Time ◽  
Decrease Rate

Multiple droplets are drops of water that continuously dropped onto a surface. Spray cooling is an application of the use of droplet on a cooling system. Spray cooling is usually used in a cooling system of electronic devices, and material quenching. In this study, correlations between Weber number and surface temperature decrease rate during multiple droplets impingement are investigated and analyzed. Visualization process is used to help determine the evaporation time of droplets impingement by using high speed camera. Induction stove is used to maintain a stainless steel surface temperature at 120°C, 140°C, and 160°C. The Weber number was varied at 15, and 52.5 to simulate low and medium Weber number. The result of this study shows that increase in Weber number does not increase the temperature decrease rate noticeably. Whereas the Weber number decrease the time required for surface temperature to reach its lowest surface temperature. It was also found that for low and medium Weber number, Weber number affect the evaporation time of multiple droplets after impingement.

Adhesion characteristics of whole milk powder to a stainless steel surface

1998 ◽  
Vol 97 (3) ◽  
pp. 191-199 ◽  
Author(s):  
Paul R. Rennie ◽  
X.D. Chen ◽  
Antony R. Mackereth
Keyword(s):  
Stainless Steel ◽  
Steel Surface ◽  
Milk Powder ◽  
Stainless Steel Surface ◽  
Whole Milk ◽  
Whole Milk Powder
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