On-site analysis system with central processor and method of analyzing

a technology of analysis system and analyzer, applied in chemical methods analysis, instruments, color/spectral property measurement, etc., can solve problems such as the inability of analytical instruments to generate values

Inactive Publication Date: 2007-06-21
COGNIS IP MANAGEMENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0019] The present invention is directed to a process for identifying and quantifying one or more properties of interest of a material, the process involving providing a material to be analyzed; providing one or more data acquisition devices capable of acquiring data for prediction of one or more properties of the material; providing a central processor capable of computing one or more predicted results using multivariate calibration models and storing a database of multivariate calibration models; providing a communication link between data acquisition devices and the central processor; and analyzing the material using the data acquisition devices and the central processor in order to obtain results on one or more properties of interest. Preferably the central processor stores at least a portion of either measurement data, measurement results, or both. Preferably the data acquisition devices are capable of being transported from site to site. The calibration model is multivariate, and compensates for an effectively comprehensive set of measurement conditions and secondary material characteristics. Preferably, the communication link is capable of providing resultant information from the central processor to a user interface in the vicinity of the sensor. However, the resultant information may be conveyed by other means, such as by telephone communication, or may be conveyed by the same type of communication link as available between data acquisition device and central processor but to a location removed from the data acquisition device.

Problems solved by technology

Analytical instruments do not generate the values of a property of interest directly.

Method used

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  • On-site analysis system with central processor and method of analyzing
  • On-site analysis system with central processor and method of analyzing
  • On-site analysis system with central processor and method of analyzing

Examples

Experimental program
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Effect test

example 1

[0197] A feasibility study was done to determine if a property model could be developed to measure the concentration of squalane in squalene. In accordance with block 70 of FIG. 4, the method was defined as FT-NIR using the MATRIX Model F instrument manufactured by Bruker Optics, with sample presentation for liquid samples provided by closure caps with dimensions of 18-mm diameter×10-mm high manufactured by Cincinnati Container Corporation. The objectives for the property model included measurements of squalane in squalene having concentrations ranging from trace amounts to about 10 weight percent with a limit of desired precision of 0.10% or smaller as measured by RMSEP. The objectives further indicated that the measurements will be taken by non-skilled operators who will dispense about 1 mL of liquid samples into separate, disposable caps, and the sample temperature may vary from about 0° C. to 60° C. In accordance with the block 72 of FIG. 4, the expected range of the concentrati...

example 3

[0204] The orientation of the sample cap is a potentially influential factor (block 84). The orientations are expected to be random. To determine if variation in the orientation of the sample cap (block 86) will affect the predicted concentrations (block 88), a sample of 1.00% of squalane in squalene was prepared and measured with four different cap orientations. The initial orientation of the cap was selected at random, and additional orientations were attained by successively rotating the cap by approximately 90 degrees about an axis perpendicular to the bottom of the cap between measurements. As shown in FIG. 11, measurable differences were observed in these spectra, indicating that orientational variance is probably an influential factor.

[0205] The six calibration samples in the training set of Example 1, each with a sample cap orientation labeled as orientation 1, were then measured with three additional orientations selected at random, labeled as orientations 2, 3, and 4, eac...

example 4

[0209] The sample pathlength for the squalane-squalene mixture, which is twice the distance from the air-liquid interface at the top of the sample volume to the reflective surface of the sample cap at the bottom of the sample, is a potentially influential factor (block 84) since the intensity of the NIR absorbance by the sample is proportional to the sample pathlength. The pathlength for a particular measurement is determined by the dimensions of the cap and the volume of sample dispensed into the cap.

[0210] Additional aspects of the method and objectives of block 70 are now defined. Suppose that the disposable caps of Examples 1 to 3 are to be used as economical sample holders for remote measurements. Since these caps are not manufactured identically, variations in the dimensions of the caps, and hence of the sample pathlength for a uniform volume of material, are inevitable. Further suppose that disposable pipettes with 0.25 mL graduations will be used as economical sample dispen...

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Abstract

The invention relates to providing analysis services to a plurality of customers using a plurality of data acquisition devices connected to a central processor, by way of a communication link, which is loaded with at least one calibration model configured to generate a predicted value of property of interest from data acquired from a pluraity of samples using the data acquisition devices wherein the analysis services include transmitting the predicted value of a property of interest to a customer from which analysis services is requested.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims priority under 35 U.S.C. §120, and is a divisional application of U.S. patent application Ser. No.10 / 188,972, filed Jul. 5, 2002 (allowed), which in turn claims priority under 35 U.S.C. §119(e) of U.S. Provisional Patent Application Nos. 60 / 307,347, filed Jul. 23, 2001 and 60 / 307,348, filed Jul. 23, 2001 (now expired), the entire contents of each of the aforementioned patent applications are incorporated herein by reference. This application is also related to U.S. patent application Ser. No. 10 / 188,853, filed on Jul. 5, 2002, the disclosure of which is incorporated herein by reference.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] Not applicable. FIELD OF THE INVENTION [0003] The present invention is generally directed to a process for analyzing materials, preferably at multiple locations. More particularly, the present invention relates to a method of rapid analysis which utilizes analyt...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G06F19/00G01N21/27G01N35/00
CPCG01N21/274G01N21/359G01N35/00712G01N2201/12792G01N2035/00881G01N2201/12753G01N35/00871
Inventor LUNDSTEDT, ALAN P.HALL, ALLEN L.TSENG, CHING-HUI
Owner COGNIS IP MANAGEMENT GMBH
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