An investigation of seeded abnormal cell concentrations in liquid based cervical cytology samples to establish minimum detection limits for raman spectroscopy

2012 ◽  
Author(s):  
A. Abekova ◽  
◽  
A. Malkin ◽  
F. Lyng
Keyword(s):  
Raman Spectroscopy ◽  
Detection Limits ◽  
Cervical Cytology ◽  
Abnormal Cell ◽  
Cell Concentrations ◽  
Minimum Detection Limits

Improved detection limits of linear Raman-spectroscopy on aerosols

1996 ◽  
Vol 27 ◽  
pp. S293-S294 ◽  
Author(s):  
R. Vehring ◽  
B. Xu ◽  
G. Schweiger
Keyword(s):  
Raman Spectroscopy ◽  
Detection Limits

Detection Limits of AC-Coupled Inverse Raman Spectroscopy

1980 ◽  
Vol 34 (2) ◽  
pp. 144-146 ◽  
Author(s):  
Jeanne P. Haushalter ◽  
G. Patrick Ritz ◽  
David J. Wallan ◽  
Kathy Dien ◽  
Michael D. Morris
Keyword(s):  
Raman Spectroscopy ◽  
Detection Limits ◽  
Nitrate Ion ◽  
Lower Detection

ac-coupled inverse Raman spectroscopy is shown to yield detection limits comparable to those obtained by spontaneous Raman spectroscopy. For an aqueous nitrate ion, inverse Raman limits are about 2.5 times higher than those reported for conventional measurements with similar laser powers and measurement times. Proposed improvements in instrumentation may lower detection limits another 10 times with no change in laser powers or measurement times.

scholarly journals Construction of a Bioluminescent Reporter Strain To Detect Polychlorinated Biphenyls

1998 ◽  
Vol 64 (12) ◽  
pp. 5023-5026 ◽  
Author(s):  
A. C. Layton ◽  
M. Muccini ◽  
M. M. Ghosh ◽  
G. S. Sayler
Keyword(s):  
Polychlorinated Biphenyls ◽  
Nonionic Surfactant ◽  
Ralstonia Eutropha ◽  
Detection Limits ◽  
Reporter Strain ◽  
Aroclor 1242 ◽  
Minimum Detection Limits

ABSTRACT A bioluminescent reporter strain, Ralstonia eutrophaENV307(pUTK60), was constructed for the detection of polychlorinated biphenyls by inserting the biphenyl promoter upstream of the bioluminescence genes. In the presence of a nonionic surfactant, which enhances the solubility of chlorinated biphenyls, bioluminescence was induced three- to fourfold over background by biphenyl, monochlorinated biphenyls, and Aroclor 1242. The minimum detection limits for these compounds ranged from 0.15 mg/liter for 4-chlorobiphenyl to 1.5 mg/liter for Aroclor 1242.

scholarly journals The multivariate detection limit for Mycoplasma pneumoniae as determined by nanorod array-surface enhanced Raman spectroscopy and comparison with limit of detection by qPCR

The Analyst ◽  
2014 ◽  
Vol 139 (24) ◽  
pp. 6426-6434 ◽  
Author(s):  
Kelley C. Henderson ◽  
Edward S. Sheppard ◽  
Omar E. Rivera-Betancourt ◽  
Joo-Young Choi ◽  
Richard A. Dluhy ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Detection Limit ◽  
Mycoplasma Pneumoniae ◽  
Limit Of Detection ◽  
Bacterial Pathogen ◽  
Detection Limits ◽  
Nanorod Array ◽  
Surface Enhanced Raman Spectroscopy ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

The detection limits by NA-SERS and qPCR for the bacterial pathogenMycoplasma pneumoniaewere compared.

Analysis of Error and Minimum Detection Limits for 222Rn Measurements

1992 ◽  
Vol 45 (1-4) ◽  
pp. 33-36 ◽  
Author(s):  
E.L. Sensintaffar ◽  
D.A. Chambless ◽  
D.J. Gray ◽  
S.T. Windham
Keyword(s):  
Detection Limits ◽  
Analysis Of Error ◽  
Minimum Detection Limits

Detection of Water Pollutants by Laser Excited Resonance Raman Spectroscopy; Pesticides and Fungicides

1978 ◽  
Vol 32 (1) ◽  
pp. 98-100 ◽  
Author(s):  
Richard J. Thibeau ◽  
Laurent van Haverbeke ◽  
Chris W. Brown
Keyword(s):  
Raman Spectroscopy ◽  
Water Sample ◽  
River Water ◽  
Resonance Raman Spectroscopy ◽  
Resonance Raman ◽  
Detection Limits ◽  
Hazardous Chemicals ◽  
Polluted River ◽  
Water Pollutants ◽  
Excited Resonance

The feasibility of resonance Raman spectroscopy in the detection of hazardous chemicals in water has been tested on some nitrophenol-based pesticides and fungicides. In most cases, detection limits below the parts per million level were obtained. The method was also tested on an artifically polluted river water sample.

X-Ray Polarization: Bragg Diffraction and X-Ray Flurorescence

1982 ◽  
Vol 26 ◽  
pp. 331-336
Author(s):  
John D. Zahrt
Keyword(s):  
State Of The Art ◽  
Detection Limits ◽  
Bragg Diffraction ◽  
X Rays ◽  
X Ray ◽  
Signal Noise ◽  
Noise Ratio ◽  
Minimum Detection Limits

Recent, state of the art, x-ray spectrometers have made use of polarizing the source x-rays by scattering through 90° (1) . One then observes the analyte fluorescence in a direction perpendicular to the scattering plane in which the polarized x-rays are generated. The signal/noise ratio at the detector is much improved. Unfortunately there is a concomitant loss of intensity and analysis times increase. This adversely affects the minimum detection limits.

Detection of Nitrate and Sulfate Anions by Normal Raman Spectroscopy and SERS of Cationic-Coated, Silver Substrates

2000 ◽  
Vol 54 (8) ◽  
pp. 1126-1135 ◽  
Author(s):  
P. A. Mosier-Boss ◽  
S. H. Lieberman
Keyword(s):  
Raman Spectroscopy ◽  
Near Infrared ◽  
Detection Limits ◽  
Surface Enhanced Raman Spectroscopy ◽  
Sulfate Ions ◽  
Sers Substrates ◽  
Surface Enhanced ◽  
Aqueous Environments ◽  
Surface Enhanced Raman ◽  
Infrared Excitation

The use of normal Raman spectroscopy and surface-enhanced Raman spectroscopy (SERS) of cationic-coated, silver substrates to detect nitrate and sulfate ions in aqueous environments is examined. For normal Raman spectroscopy using near-infrared excitation, a linear concentration response was observed with detection limits of 260 and 440 ppm for nitrate and sulfate, respectively. Detection limits in the low parts-per-million concentration range for these anions are achieved by using cationic-coated, silver SERS substrates. Adsorption of the anions on the cationic-coated SERS substrates is described by a Frumkin isotherm.

Feasibility of Quantitative UV Resonance Raman Spectroscopy with a KrF Excimer Laser

1987 ◽  
Vol 41 (3) ◽  
pp. 422-427 ◽  
Author(s):  
Liang-Tsair Lin ◽  
Charles K. Mann ◽  
Thomas J. Vickers
Keyword(s):  
Raman Spectroscopy ◽  
Excimer Laser ◽  
Resonance Raman Spectroscopy ◽  
Resonance Raman ◽  
Internal Standard ◽  
Detection Limits ◽  
Spectral Lines ◽  
Array Detector ◽  
Fitting Procedure ◽  
Krf Excimer Laser

The feasibility of quantitative resonance Raman spectroscopy with a KrF excimer laser providing primary radiation at 249 nm has been examined. The instrumentation is described, and results are reported for measurements with a photomultiplier detector and scanning monochromator. Considerations affecting the success of the internal standardization are described. A least-squares fitting procedure is employed for quantifying the overlapped analyte and internal standard spectral lines. Instrumental detection limits of 2.2, 1.2, and 1.0 mg/L are reported for anthracene, 9-methylanthracene, and 2-methylanthracene, respectively, for spectra obtained with 120 laser pulses per step. Detection limits in the low ppb range are projected for a system employing an intensified diode array detector.

Analysis of Error and Minimum Detection Limits for 222Rn Measurements

1992 ◽  
Vol 45 (1-4) ◽  
pp. 33-36
Author(s):  
E.L. Sensintaffar ◽  
D.A. Chambless ◽  
D.J. Gray ◽  
S.T. Windham
Keyword(s):  
Detection Limits ◽  
Analysis Of Error ◽  
Minimum Detection Limits
Sign in / Sign up

Export Citation Format

Share Document