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Rapid Determination Method of Arsenic in Aquatic Products

A rapid detection and aquatic product technology, applied in the direction of material excitation analysis, fluorescence/phosphorescence, etc., to achieve fast detection speed, make up for the long cycle of detection results, and accurate and reliable detection data

Active Publication Date: 2017-12-26
YELLOW SEA FISHERIES RES INST CHINESE ACAD OF FISHERIES SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no standard for the rapid detection method for the determination of arsenic in aquatic products in the international ISO and CAC standards

Method used

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  • Rapid Determination Method of Arsenic in Aquatic Products
  • Rapid Determination Method of Arsenic in Aquatic Products
  • Rapid Determination Method of Arsenic in Aquatic Products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: the mensuration of As in yellow croaker:

[0034] A rapid determination method for arsenic in aquatic products, comprising: 1) selected instruments and equipment, 2) preparation of a standard curve, 3) testing steps, 4) instrument conditions used in the experiment, 5) calculation and presentation of results;

[0035] 1) Instruments and equipment: DAA-5300 (Direct Arsenic Analyzer) and atomic fluorescence spectrometer combined system:

[0036] (1) Direct sampling arsenic measurement device: model DAA-5300, equipped with a quartz sample boat, gas circuit control system, two tube furnaces, electrothermal quartz tubes, and coated electrothermal quartz tubes;

[0037] (2) Atomic Fluorescence Spectrometer (AFS): Model 8230, equipped with photomultiplier tube (PMT) negative high voltage, arsenic hollow cathode lamp, detector, gas circuit control system;

[0038] (3) Mixed gas of hydrogen and argon (15%+85%).

[0039] 2) Preparation of the standard curve: Mix th...

Embodiment 2

[0061] Embodiment 2: to the mensuration of As in the scallop:

[0062] Mix the scallop standard substance (GBW10024) and alumina 1:10 evenly, weigh about 15.0mg of the mixed sample and put it into the quartz sampling boat, and then put the quartz sampling boat into the direct sampling arsenic measuring device and atomic The value of arsenic was determined in the fluorescence spectrometer; other conditions were the same as those of yellow croaker, and the determination results of the recovery rate of the scallop standard substance (see Table 3).

[0063] Table 3. Determination results of As recovery rate in scallop reference material

[0064]

[0065]

[0066] It can be seen from Table 3 that the recovery rate of As in the scallop reference material is 86.11-90.83%, and the recovery effect is ideal.

Embodiment 3

[0067] Embodiment 3: to the mensuration of As in the clam:

[0068] Shell the clams, mash the meat and mix it evenly with alumina at a ratio of 1:10, weigh about 40.0 mg of the mixed sample and put it into the quartz sampling boat, and then put the quartz sampling boat into the direct sampling and measuring arsenic device The value of arsenic was measured in an atomic fluorescence (AFS) coupled instrument; in addition, weighed 500 mg of the above-mentioned mixed homogeneous sample, added 100 mg and 300 mg of laver standard material containing As content of 1000 ng / g and mixed uniformly, which was equivalent to adding 1.67 mg / kg and 3.75mg / kg of As, weigh about 20.0mg and place it in a quartz sampling boat, set the direct sampling arsenic measuring device and the atomic fluorescence spectrometer to measure the value of As; other conditions are the same as those of yellow croaker, The determination results of As spiked recovery in clams (see Table 4).

[0069] Table 4. Determin...

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Abstract

A rapid determination method for arsenic in aquatic products, which belongs to the detection technology of aquatic products, includes: 1) selected instruments and equipment, 2) preparation of standard curve, 3) test steps, 4) instrument conditions used in experiments, 5) Calculation and expression of results; the detection data of the present invention is accurate and reliable, and the arsenic in aquatic products can be directly measured by solid sample injection without digestion and acid removal, and at the same time avoids the pollution of strong acid; it makes up for the incomplete digestion in the existing national standard method. The defects that lead to the distortion of test data and the long cycle of test results, the test time is shortened from more than 50 hours in the existing standard to 0.1 hour, which meets the need for supervision of the effectiveness of the determination of total arsenic content in aquatic products, and has the ability to The detection speed of arsenic content is fast, and the timeliness of quality supervision is strong.

Description

technical field [0001] The invention belongs to the detection technology of aquatic products, and in particular relates to a rapid determination method of arsenic in aquatic products. Background technique [0002] The 72nd meeting of the Food and Agriculture Organization of the United Nations and the World Health Organization Joint Expert Committee on Food Additives (JECFA) comprehensively evaluated the toxicity of arsenic and arsenic compounds in the risk assessment report on arsenic (As) exposure in food, and reassessed and proposed weekly Tolerable Intake Value (PTWI). Based on the average amount of exposure, after an average of 11.5 years of follow-up, the committee proposes that the minimum daily baseline dose (BMD) at which cancer incidence increases by 0.5% over background 0.5 ) is 3.0μg / kg b.W., through the sensitivity survey analysis of the uncertainty affecting the exposure assessment, it shows that BMD 0.5 lower limit (BMDL 0.5 ) is 2.0-7.0 μg / kg b.w. per day. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
Inventor 尚德荣赵艳芳宁劲松翟毓秀杨元昊盛晓风丁海燕李风铃
Owner YELLOW SEA FISHERIES RES INST CHINESE ACAD OF FISHERIES SCI
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