Chemical Technique for Milling Stainless Steel Capillary Tube Ends

1970 ◽  
Vol 8 (4) ◽  
pp. 232-232 ◽  
Author(s):  
W. E. Bambrick ◽  
J. T. Geoghegan
Keyword(s):  
Stainless Steel ◽  
Capillary Tube ◽  
Stainless Steel Capillary ◽  
Chemical Technique

Plasma regime transition in a needle-FAPA desorption/ionization source

2016 ◽  
Vol 31 (11) ◽  
pp. 2213-2222 ◽  
Author(s):  
Jonatan Fandino ◽  
Jaime Orejas ◽  
Jorge Pisonero ◽  
Philippe Guillot ◽  
Nerea Bordel ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Atmospheric Pressure ◽  
Capillary Tube ◽  
Hypodermic Needle ◽  
Ionization Source ◽  
Stainless Steel Capillary ◽  
Cut Edge ◽  
Desorption Ionization ◽  
Plasma Device ◽  
Flowing Atmospheric Pressure Afterglow

The needle-Flowing Atmospheric Pressure Afterglow (n-FAPA) is a miniaturized plasma device with Ambient Desorption/Ionization capabilities. It is generated in flowing He using two concentric electrodes: a stainless steel capillary tube (outer electrode), and a hypodermic needle with a bevel-cut edge (inner electrode).

Determination of ultra-trace amounts of chlorophenols in rain, tap and river water by an electrochemically controlled in-tube solid phase microextraction method

RSC Advances ◽  
2016 ◽  
Vol 6 (97) ◽  
pp. 94564-94573 ◽  
Author(s):  
Hamid Asiabi ◽  
Yadollah Yamini ◽  
Maryam Shamsayei
Keyword(s):  
Stainless Steel ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Capillary Tube ◽  
Stainless Steel Capillary ◽  
Inner Surface ◽  
Copolymer Coating ◽  
Ultra Trace ◽  
Trace Pollutants

A nanostructured copolymer coating consisting of PPy doped with Naf was electrochemically synthesized on the inner surface of a stainless steel capillary tube. It was utilized to extract trace pollutants from water samples.

Overcoming Gas Sampling Problems: Analysis of Volatiles Using Capillary Column Needles

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 643f-643
Author(s):  
Weimin Deng ◽  
Randolph M. Beaudry
Keyword(s):  
Stainless Steel ◽  
Capillary Column ◽  
Dependent Manner ◽  
Stainless Steel Capillary ◽  
Stainless Steel Needle ◽  
Injection Volume ◽  
Volatile Analysis ◽  
Gas Tight ◽  
Sampling Problems ◽  
Time Injection

Sampling factors that could affect gas chromatograph (GC) response for volatile analysis such as syringe pumping time, injection volume, needle length, temperature, and the type of volatile were investigated. Capillary GC column segments (steel and glass) were installed in gas-tight syringes and used as needles for volatile analysis. Standard stainless-steel needles were also used. Hexylacetate, ethyl-2-methylbutyrate, 6-methyl-5-hepten-2-one, and butanol standard were measured. The number of pumps required to maximize GC response for each needle–volatile combination was determined. Maximal GC response for hexylacetate using standard stainless steel, capillary glass, and capillary steel needles required 10, 20 and 30 pumps, respectively. However, for butanol measurement, the optimal syringe pump number was 5 to 10 for all needle types. The use of a capillary needle resulted in an increase in GC response in the range of 3- to 15-fold relative to a standard stainless steel needle. Injection volume affected GC response in a needle-and volatile-dependent manner. In no case did injection volume vs. GC response extrapolate through origin. The GC response for capillary column needles increased as temperature decreased. Capillary column needles may be useful tools for analysis of volatiles that readily partition into the column coating.

scholarly journals Highly Sensitive Photoacoustic Microcavity Gas Sensor for Leak Detection

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 1164 ◽  
Author(s):  
Ke Chen ◽  
Yewei Chen ◽  
Bo Zhang ◽  
Liang Mei ◽  
Min Guo ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Gas Sensor ◽  
Second Harmonic ◽  
Low Cost ◽  
Side Wall ◽  
Leak Detection ◽  
Micro Electro Mechanical System ◽  
Stainless Steel Capillary ◽  
Highly Sensitive ◽  
Mems Microphone

A highly sensitive photoacoustic (PA) microcavity gas sensor for leak detection is proposed. The miniature and low-cost gas sensor mainly consisted of a micro-electro-mechanical system (MEMS) microphone and a stainless-steel capillary with two small holes opened on the side wall. Different from traditional PA sensors, the designed low-power sensor had no gas valves and pumps. Gas could diffuse into the stainless-steel PA microcavity from two holes. The volume of the cavity in the sensor was only 7.9 μL. We use a 1650.96 nm distributed feedback (DFB) laser and the second-harmonic wavelength modulation spectroscopy (2f-WMS) method to measure PA signals. The measurement result of diffused methane (CH4) gas shows a response time of 5.8 s and a recovery time of 5.2 s. The detection limit was achieved at 1.7 ppm with a 1-s lock-in integral time. In addition, the calculated normalized noise equivalent absorption (NNEA) coefficient was 1.2 × 10−8 W·cm−1·Hz−1/2. The designed PA microcavity sensor can be used for the early warning of gas leakage.

Determination of Thermal Inactivation Kinetics of Microorganisms with a Continuous Microflow Apparatus

2004 ◽  
Vol 67 (11) ◽  
pp. 2560-2564 ◽  
Author(s):  
C. R. LOSS ◽  
J. H. HOTCHKISS
Keyword(s):  
Thermal Inactivation ◽  
Capillary Tube ◽  
Raw Milk ◽  
Heating Time ◽  
Inactivation Kinetics ◽  
Weibull Function ◽  
Stainless Steel Capillary ◽  
Heat Treated ◽  
Native Microflora ◽  
Kinetics Of

Use of a continuous microflow submerged microcoil (CSMC) apparatus was compared with the capillary tube (CT) method for measuring the thermal inactivation kinetics of Pseudomonas fluorescens at 61°C for 3 to 29 s. Inocula were continuously pumped through a microbore (≤0.0762 cm inside diameter) thin-walled stainless steel capillary tube submerged in a heated oil bath. The heating time was set by changing the flow rate, tube dimensions, or both. With the use of microthermo-couples, the time for the inocula to reach within 1°C of the set temperature was <3 s, and shorter than that with capillary tubes or vials. Inactivation curves (61°C) for P. fluorescens prepared by the CSMC method were not different from curves prepared by the CT method, as determined by analysis of variance (P > 0.05). Inactivation of Bacillus cereus spores (105°C) and native microflora found in raw milk (72°C) over heating times of 3 to 42 s were determined by CSMC. CSMC can measure thermal inactivation kinetics of microorganisms efficiently and simply at high temperatures and in short times. Survivors can be enumerated in 1-ml volumes of heat-treated samples, making it useful for determining inactivation kinetics of low numbers of microorganisms, such as those found in high-quality raw milk. Inactivation kinetics were generally more accurately described by the Weibull function (R2 ≥ 0.97) than the linear kinetic model.

scholarly journals High Speed Slurry Flow Finishing of Inner Wall of Stainless Steel Capillary (2nd Report)

1998 ◽  
Vol 64 (8) ◽  
pp. 1186-1190
Author(s):  
Keiichiro YAMAMOTO ◽  
Toshiji KUROBE ◽  
Yoshinori YAMADA ◽  
Takehiko MIURA
Keyword(s):  
Stainless Steel ◽  
High Speed ◽  
Slurry Flow ◽  
Stainless Steel Capillary
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