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Uncertainty evaluation method for calculating polychlorinated biphenyl content detection results in aquatic products through internal standard curve method

A technology of standard uncertainty and standard curve method, applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of complex matrix composition, difficult processing process, multi-component instrument analysis interference, etc., to simplify the quantitative evaluation process. Effect

Inactive Publication Date: 2018-08-28
FISHERIES SCI RES INST OF JILIN PROVINCE
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Problems solved by technology

At present, the determination data of PCBs content in aquatic products is usually obtained by gas chromatography and gas chromatography-mass spectrometry. Due to the complex matrix composition of aquatic products, the pretreatment process is difficult, and the multi-component instrument analysis has many interferences. These factors will affect the detection results. quality makes a difference

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  • Uncertainty evaluation method for calculating polychlorinated biphenyl content detection results in aquatic products through internal standard curve method
  • Uncertainty evaluation method for calculating polychlorinated biphenyl content detection results in aquatic products through internal standard curve method
  • Uncertainty evaluation method for calculating polychlorinated biphenyl content detection results in aquatic products through internal standard curve method

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Embodiment Construction

[0057] The method for evaluating the uncertainty of polychlorinated biphenyl content detection results in aquatic products by the internal standard standard curve method, the method for calculating the polychlorinated biphenyl content in aquatic products by using gas chromatography to measure and draw the internal standard standard curve in the method of the present invention is specific The operation steps are:

[0058] (1) Sample weighing:

[0059] Weigh the uniformly pulverized fish sample, and give the weighing mass m as 5.0g, accurate to 0.1g.

[0060] (2) 40ng / mL (C n1 ) Preparation of internal standard working solution:

[0061] The purchased concentration is 2.0 μg / mL (C n0 1mL (V 1.0 ) were all transferred and adjusted to 50mL (V 50.0 ) in a volumetric flask.

[0062] (3) Addition of internal standard in the sample:

[0063] In the weighed fish sample, use a pipette with a volume range of 100 μL to 1000 μL to precisely pipette the internal standard standard sol...

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Abstract

The invention discloses an uncertainty evaluation method for calculating polychlorinated biphenyl content detection results in aquatic products through an internal standard curve method and belongs tothe technical field of aquatic product quality safety detection and analysis. The method comprises the following steps: 1, calculating polychlorinated biphenyl content of aquatic species by adoptinga method for determining by a gas chromatograph and drawing an internal standard curve; 2, establishing a quantitative mathematical model X=(Cn3*x*V1*frep) / m of uncertainty of the polychlorinated biphenyl content detection results in aquatic products; 3, analyzing an uncertainty source; 4, determining assessment of each component of the uncertainty; 5, calculating the synthetic standard uncertainty. According to the method disclosed by the invention, by establishing the uncertainty calculation mathematical model, analyzing the related uncertainty source and performing reasonable quantified calculation on each component, accurate analysis and reasonable expression of the uncertainty in a sample treatment process, an instrument determination process and an internal standard curve quantitative analysis process can be realized.

Description

technical field [0001] The invention belongs to the technical field of detection and analysis of the quality and safety of aquatic products, and in particular relates to a method for evaluating the uncertainty of detection results of polychlorinated biphenyl content in aquatic products by an internal standard method. Background technique [0002] Polychlorinated Biphenyls (PCBs) are the most representative class of persistent organic pollutants (POPs), with prominent carcinogenic, teratogenic, mutagenic biotoxicity, bioaccumulation, and environmental persistence. Human health is extremely harmful. Seven "indicative PCB" monomers (PCB28, PCB52, PCB101, PCB118, PCB153, PCB138, PCB180) are specified in the Global Environmental Monitoring System / Food Planning Section (GEMS / FOOD) as commonly used indicators for monitoring PCBs pollution, usually in the form of The total PCBs analysis of aquatic food is the main monitoring index. The US Food and Drug Administration (FDA) recommen...

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Application Information

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IPC IPC(8): G01N30/86
CPCG01N30/86
Inventor 王文兰郭军高春山赵全东
Owner FISHERIES SCI RES INST OF JILIN PROVINCE
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