Data acquisition method and heating system for oxygen radical absorbance capacity measuring analyzer

It is a technique of absorbing capacity and measuring analysis, which is applied in the direction of chemical instruments and methods, material excitation analysis, heating or cooling equipment, etc., and can solve problems such as impact and difficulty in achieving the same range.

Active Publication Date: 2014-01-29
上海智城分析仪器制造有限公司
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Problems solved by technology

[0004] In addition, because the existing ORAC analyzer is electrically heated in the instrument cavity, the temperature of each measured tube will not be strictly the same, that is, the temperature difference of the measured liquid in each tube is difficult to reach the strict same range of <0.05°C, and the temperature is precisely Have a considerable impact on the results of ORAC assay data

Method used

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  • Data acquisition method and heating system for oxygen radical absorbance capacity measuring analyzer
  • Data acquisition method and heating system for oxygen radical absorbance capacity measuring analyzer
  • Data acquisition method and heating system for oxygen radical absorbance capacity measuring analyzer

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Embodiment Construction

[0020] 1. The results of the temperature stability investigation of the sample test tube rack

[0021] Method: Place the two thermometers respectively in the groove of the sample holder ( Image 6 ) near both ends, and in close contact with the groove surface. At the same time, under the drive of the stepping motor, the sample rack groove moves back and forth in the same way during the measurement, and within a certain period of time, the surface temperature value of the sample rack groove is read regularly. The results are shown in Table 1 below.

[0022] Table 1: Temperature control effect of the metal plate of the sample holder (the solvent temperature in the sample tube is at the set temperature (37) ± 0.1°C):

[0023]

[0024] It can be seen from the table that during the measurement time of two hours (the general ORAC analysis measurement time is 0.5 to 1 hour), the temperature changes at both ends are very small, and the extreme differences are 0.05°C and 0.04°C re...

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Abstract

The invention relates to an antioxidant capacity analyzing tester in the field of analyzing testers, in particular to a data acquisition method and a heating system for an oxygen radical absorbance capacity (ORAC) measuring analyzer. A method for acquiring data by scanning is adopted on a data acquisition system with a positive temperature coefficient (PTC) constant temperature heating system, namely in a measured tube diameter range of a certain data acquisition point, data sets are acquired by scanning in a short period of time, and the maximum data acquired by scanning in the short period of time is selected as data acquired at the time point. By the invention, the coefficient of variation of the data sets acquired by the type of instruments can be obviously reduced on statistical significance, so that errors of a measurement result within assays and a measurement result between assays are directly reduced obviously.

Description

technical field [0001] The invention relates to an anti-oxidation capacity analyzer in the field of analytical instruments, in particular to a data acquisition method and a heating system in an oxygen radical absorption capacity (ORAC) analyzer. Background technique [0002] The existing Oxygen Radical Absorbance Capacity (ORAC) assay analyzer adopts the "point data acquisition method" for data acquisition in the determination and analysis. This fixed-point acquisition method is to move several sample tubes to be determined on the tubular sample rack to to the detection position, measure the fluorescence data value tube by tube (see figure 1 ), and its heating system adopts electric heating of the instrument cavity. [0003] Since this type of instrument collects the data of the intensity of fluorescence emission at each time point as the measurement data during the measurement and analysis process, within a certain period of time (30 minutes to 60 minutes), the collected d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64B01L7/00
Inventor 章蔚娟胡裕杰史国兴邵卫樑
Owner 上海智城分析仪器制造有限公司
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