Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture
Reexamination Certificate
2007-01-23
2007-01-23
Cygan, Michael (Department: 2855)
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
C210S692000, C095S088000
Reexamination Certificate
active
11196040
ABSTRACT:
A concentrating column useful for elemental analysis of trace metals consists mainly of column body, filtration membranes6fixed at the fluid inlet end and the outlet end of the column body, and column packing8packed inside the column body, wherein column packing8is prepared from the swollen and cleaned macroporous adsorbent resin of high, medium or non-polarity treated with a mixture of 3 mol/L NH4OH-1 mol/L HAC-3.0˜6.0×10−4mol/L pyridin-(2-azo-4-)resorcin or a mixture of 0.5 mol/L Na2HPO4-1.0˜2.0×10−4mol/L pyridin-(2-azo-4-)resorcin by dynamic on-column treatment or static immersion treatment. Two types of sample processing devices useful for elemental analysis of trace metals are provided with concentrating column employing the above-mentioned column packing. The concentrating column of the present invention simplifies the sample processing flow and the structure of sample processing device, saves chemical reagent, increases sample processing rate, and particularly prevents the toxic methanol from doing harm to the operator's health.
REFERENCES:
patent: 4081401 (1978-03-01), Takegami et al.
patent: 4081403 (1978-03-01), Takegami et al.
patent: 4392963 (1983-07-01), Perl et al.
Smirnov, I. P. and Nesterenko, P.N. “Use of High-Efficiency Liquid-Chromatography in Determining the Metal Content of Waste-Water”, Fibre Chemistry, vol. 24, Sep. 1993, pp. 422-424.
Pauli, B. and Jones, P. “A Comparative Study of the metal Selective Properties of Chelating dye Impregnated Resins for the Ion Chromatographic Separation of Trace Metals.” Chromatographia, vol. 42, May 1996, pp. 528-538.
Jiang Xiaoping
Zhang Xinshen
Cygan Michael
Jenkins Wilson Taylor & Hunt, P.A.
Sichuan University
LandOfFree
Concentrating column and sample processing device useful for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Concentrating column and sample processing device useful for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Concentrating column and sample processing device useful for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3803908