X-ray or gamma ray systems or devices – Specific application – Fluorescence
Reexamination Certificate
2007-11-20
2007-11-20
Song, Hoon (Department: 2882)
X-ray or gamma ray systems or devices
Specific application
Fluorescence
C378S044000
Reexamination Certificate
active
11000535
ABSTRACT:
An x-ray fluorescence technique for detecting the level of arsenic in a sample of water or body fluid. Arsenic and lead are expected to fluoresce in a first energy band and lead is expected to also fluoresce separately in a second energy band. An excitation path directs x-rays toward the sample; a first detection path detects x-ray fluorescence of the first energy band from the sample; and a second detection path detects x-ray fluorescence of the second energy band from the sample. The level of arsenic can be obtained by analyzing the x-ray fluorescence from both detection paths, and using a constant which relates the level of lead in the second energy band to the level of lead in the first energy band. The excitation path and each detection path may each include a monochromating optic to transmit the desired x-ray energy band, e.g., a doubly curved optic.
REFERENCES:
patent: 4460274 (1984-07-01), Schumann et al.
patent: 5014287 (1991-05-01), Thornton et al.
patent: 6285734 (2001-09-01), von Alfthan
patent: 6310935 (2001-10-01), Kuwabara
patent: 6697454 (2004-02-01), Nicolich et al.
patent: 2004/0240606 (2004-12-01), Laurila et al.
S. Raj et al., “Valence Electronic Structure of Mn in Undoped and Doped Lanthanum Manganites from Relative K X-Ray Intensity Studies”, Nuclear Instruments and Methods in Physics Research, Section—B: Beam Interactions with Materials and Atoms, , Elsevier, Amsterdam, NL, vol. 174, No. 3, pp. 344-350 (Apr. 2001).
H. Ida et al., “Analysis of Wrapped of Cased Object by a Hand-Held X-Ray Fluorescence Spectrometer”, Forensic Science International, Elsevier Scientific Publishers Ireland, Ltd., IE, vol. 151, No. 2-3, pp. 267-272, (Jul. 16, 2005).
P.J. Custodio et al., “Direct Analysis of Human Blood (Mothers and Newborns) by Energy Dispersive X-Ray Fluorescence”, Journal of Trace Elements in Medicine and Biology, vol. 19, pp. 151-158 (Dec. 2, 2005).
Chen Zewu
Gibson Walter M.
Heslin Rothenberg Farley & & Mesiti P.C.
Klembczyk, Esq. Jeffrey
Radigan, Esq. Kevin P.
X-ray Optical Systems, Inc.
LandOfFree
Portable and on-line arsenic analyzer for drinking water does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Portable and on-line arsenic analyzer for drinking water, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Portable and on-line arsenic analyzer for drinking water will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3886276