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suppressed conductivity detection

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Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001778
EISBN: 978-1-62708-178-8
.... If the conductivity of the sample ions is measured in the presence of the conductivity from the eluent, their relatively small contribution to the total conductivity is difficult to detect, and because the method is so insensitive, it has limited utility. The novel method of suppressing the clucnt conductivity made...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006630
EISBN: 978-1-62708-213-6
... Abstract This article presents a detailed account of ion chromatography (IC). It begins by describing the principles of common separation modes in IC. This is followed by a section on the different modes of detection, namely suppressed conductivity detection, nonsuppressed conductivity...
Image
Published: 15 December 2019
; suppressed conductivity detection. Second dimension: eluent, 35 mM potassium hydroxide, flow rate: 10 μL/min, temperature, 30 °C; suppressed conductivity detection. Five milliliters of the suppressed first-dimension eluent (19 to 24 min) was diverted to a capillary concentrator and subsequently brought More
Image
Published: 15 December 2019
Fig. 9 Separation of anions on 4 mm ID IonPac AS19-4μm and AG19 columns; eluent: 10 mM potassium hydroxide from 0 to 10 min, 10 to 45 mM potassium hydroxide from 10 to 25 min; flow rate: 1 mL/min; injection volume: 10 μL; temperature: 30 °C; suppressed conductivity detection. Peaks: (1 More
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006464
EISBN: 978-1-62708-190-0
... ). Detection also requires that the thermal properties (thermal conductivity and diffusivity) of the flaw be substantially different from that of the surrounding matrix. Fig. 6 Effect of aspect ratio on the center point of a flat-bottom hole. Larger aspect ratios behave similarly to an adiabatic...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006450
EISBN: 978-1-62708-190-0
... that are basic to the eddy-current inspection method are described in principle by the equations devised by Maxwell for particular boundary values for practical applications. In 1879, Hughes, using an eddy current method, detected differences in electrical conductivity, magnetic permeability, and temperature...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006444
EISBN: 978-1-62708-190-0
... of the vibrothermography process: vibration of the specimen by a transducer; conversion of vibrational energy into heat by a crack, delamination, and other contacting surfaces; conduction of the heat to an external surface; and infrared detection of the heat with a thermal camera. vibrothermography delaminations...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001755
EISBN: 978-1-62708-178-8
... ). These relatively inexpensive systems are suitable for images that cannot be readily discriminated by gray-level differences. Feature detection is conducted using a cross-hair cursor viewed with the microscope or using a writing stylus with the image projected onto a digitizer tablet or on photographs attached...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004173
EISBN: 978-1-62708-184-9
... of the bobbin flange ( Fig. 10 , 11 ). Microprobing of the wire showed that the site pointed out in Fig. 11 was the only break in the coil. Energy-dispersive x-ray spectroscopy (EDS) of the corrosion product detected chlorine. The failed coil had been in service near a seacoast, and it appeared...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006650
EISBN: 978-1-62708-213-6
... pulses can be highly selective, and only spins experiencing precise tip angles (π/2 and π pulses) will be detected. These types of experiments are readily available with commercial instruments and often are denoted as background-suppression experiments. Calibration and Accuracy The MAS NMR Technique...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006449
EISBN: 978-1-62708-190-0
... inspection, flaw detection, wall-thickness measurement, conductivity testing, surface inspection, and corrosion detection ( Ref 19 , 20 ). As discussed elsewhere in this Volume, EC inspection relies on the creation of an alternating magnetic field (with the use of an induction coil) to induce a voltage...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006457
EISBN: 978-1-62708-190-0
.... This article specifically addresses the three terms as they apply to adhesive-bonded joints within structures. Inspection reference standards must be developed for each instrument, and the standards must be made available to and used by inspectors to standardize their equipment and to permit them to detect...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005857
EISBN: 978-1-62708-167-2
... to provide the maximum sensitivity of detection. This is best achieved by conducting two successive tests; in the second test, the magnetic field should be at an angle of 90° to the field in the first test. This ensures a sizeable field component at right angles to any discontinuity. Using modern...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006446
EISBN: 978-1-62708-190-0
... of scattering is used in applications involving enhanced crack detection. Acoustoelastic NDE conducted at sufficiently low modulation frequency to avoid resonances in the component being tested are considered quasi-static. Measurements conducted under truly static conditions are difficult due...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005514
EISBN: 978-1-62708-197-9
... of metal alloys, especially at high temperatures, is difficult because of the reactivity of some alloys. A variety of strategies has been adopted to overcome this difficulty: Perform experiments quickly to minimize reactions or suppress other effects: One example is the use of transient methods...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004145
EISBN: 978-1-62708-184-9
... control of the chloride contamination. Subsequently, EAC incidents in BWR subsystems have been dominated by intergranular cracking, and, in some cases, these have been detected after relatively short operating times. For instance, such cracking was observed in late 1965 due to intergranular stress...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001835
EISBN: 978-1-62708-181-8
..., and the general features of ductile and brittle fracture modes. fractography fracture modes scanning electron microscopy specimen preparation THE SCANNING ELECTRON MICROSCOPE has unique capabilities for analyzing surfaces. A beam of electrons moves in an x - y pattern across a conductive specimen...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001233
EISBN: 978-1-62708-170-2
...) Deburring and radiusing. (i) Electropolishing The rate of material removal in ECM is governed by Faraday's law, since it is a function of current. The primary variables that affect the current density and the material removal rate are: Voltage Feed rate Electrolyte conductivity...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003442
EISBN: 978-1-62708-195-5
... of thermal expansion and coefficient of moisture expansion; glass transition temperature; thermal conductivity, diffusivity, and specific heat. lamina nonmechanical testing laminate nonmechanical testing nonmechanical properties composite materials ply thickness density coefficient of thermal...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006641
EISBN: 978-1-62708-213-6
... the detection limit for trace metals. This requires a compromise between minimizing the detection limit and reducing signal suppression caused by the matrix element. Isobaric interference must be taken into account to obtain accurate data. It occurs when two different species have the same or nearly...