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Determination method of trivalent aluminum in aquatic product and product thereof
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A measurement method and aquatic product technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., to achieve accurate scientific evaluation, reasonable selection of experimental conditions, and accurate and reliable detection data
Active Publication Date: 2013-11-13
YELLOW SEA FISHERIES RES INST CHINESE ACAD OF FISHERIES SCI
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At present, there is no method standard for the determination of trivalent aluminum in aquatic products in the international ISO and CAC standards
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Embodiment 1
[0050] Embodiment 1: the mensuration of AL (III) in sea-tangle
[0051] 1. Instruments and equipment used in this embodiment: HPLC-I CP-MS coupled system:
[0052] (1), HPLC (U.S. Perkin-Elmer Company, model Series 200) part: use SERIES200 high-pressure liquid phase pump, equipped with automatic sampler, equipped with guard column CG5A 4 × 50mm and CG5A 4 × 250mm cation of the same material filler exchange column;
[0053] (2), ICP-MS (Perkin-Elmer, USA, model ELAN DRCII) part: equipped with dynamic reaction cell (DRC), sample injection system, radio frequency generator, plasma system, interface, ion lens system, quadrupole rod , vacuum system, detector, gas path control system;
[0054] (3), cooling circulating water (US POLYSCIENCE company, model SHA-C);
[0055] (4), water bath constant temperature oscillator (Shanghai Hexin Instrument Co., Ltd., model SHA-C);
[0056] (5), sand core filter (sand core filter device, model SH / T0093);
[0057] (6), circulating vacuum pum...
Embodiment 2
[0092] Embodiment 2: to the mensuration of Al(III) in sea cucumber:
[0093] Weigh 4.000 g of a fresh sample (need to be crushed and homogenized) and place it in a 50 mL graduated test tube with stopper, add 20 mL of mobile phase and mix well. Shake in a water bath at 70°C for 1 hour to fully extract the sample. Remove to cool. Centrifuge at 4000r / min for 15min, take out the supernatant and filter it with a 0.45 micron water-based microporous membrane, and measure the value of AL(III) on the machine. Other conditions are the same as those of sea-tangle, and the measurement results of the standard recovery of sea-tangle (see Table 4).
[0094] Table 4, the measurement result of standard recovery rate of sea ginseng (in dry basis)
[0095]
[0096]
[0097] As can be seen from Table 4: the recovery rate of our standard-added Al(III) is 90.1%, and the recovery effect is ideal;
[0098] In summary, it can be seen from Table 2 that the analytical performance of the instru...
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Abstract
The invention discloses a determination method of trivalent aluminum in an aquatic product and a product thereof. The determination method comprises the following steps: extracting trivalent aluminum in the aquatic product and the product thereof by using a mixed liquid of 0.0040mol / L lithium hydroxide, 0.0060mol / L pyridine-2.6-dicarboxylic acid and 0.090mol / L glacial acetic acid; separating in a high performance liquid chromatograph; eluting Al in various forms with a flowing phase sequentially because a cation-exchange chromatographic column has different absorption capabilities on Al in various forms; analyzing and detecting 27AL in an eluent through an inductive coupling plasma spectrometer, thus more complete biological characteristics of Al in the aquatic product are given. According to the invention, the experiment conditions are reasonably selected, and the detection data is accurate and reliable and is not influenced by digestion time and temperature; and by using the method, the contents of trivalent aluminum in the aquatic product and the product thereof can be determined accurately.
Description
Technical field: [0001] The invention belongs to the detection technology of aquatic products, and in particular relates to a method for measuring trivalent aluminum in aquatic products and products thereof by using high performance liquid chromatography-inductively coupled plasma mass spectrometer (HPLC-ICP-MS) combined technology. Background technique: [0002] At present, one of the frontiers of elemental analytical chemistry is the qualitative and quantitative analysis of different forms of elements, not just the determination of the total amount of elements, mainly because different forms of the same element may have completely different chemical properties, aluminum is A typical element of it. The chemical form of aluminum in seaweed and other aquatic organisms is different from that in terrestrial organisms. The difference in element form is a key factor affecting the evaluation of the edible safety of seaweed, but there are few studies in this area, especially about ...
Claims
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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88
Inventor 尚德荣赵艳芳翟毓秀宁劲松谭志军郭莹莹
Owner YELLOW SEA FISHERIES RES INST CHINESE ACAD OF FISHERIES SCI
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