Automatic analyzing method for trace metal element in sea water, river water
A technology for trace metal elements and automatic analysis, which is applied in the fields of analyzing materials, measuring devices, material separation, etc., to reduce the cost of analysis and improve the accuracy of analysis.
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Embodiment 1
[0022] This embodiment analyzes trace metal elements in seawater, using figure 1 , figure 2 , Figure 4 The automatic analyzer shown is tested.
[0023] Concentration column: section diameter φ5mm, column length 50mm, column packing 23 is C 18 Chemically bonded stationary phase (commercially available).
[0024] Complexing agent: 10% 8-hydroxyquinoline ethanol solution.
[0025] Cleaning solution: deionized water.
[0026] Desorption solution: methanol-water-HNO 3 solution, 14% by volume in methanol, HNO 3 0.1mol / L.
[0027] Low-pressure chromatographic separation column: a low-pressure cationic column packing with a cross-sectional diameter of φ5mm, a column length of 60mm, and an exchange capacity of 0.04mmol / g. It is made of sulfonated styrene-divinylbenzene polymer with concentrated sulfuric acid or chlorosulfonic acid.
[0028] Eluent: Weigh 3.002g of tartaric acid, 2.101g of citric acid, add 490ml of water, stir and dissolve with solid LiOH·H 2 O to adjust the ...
Embodiment 2
[0034] This embodiment analyzes trace metal elements in estuary water, adopts figure 1 , figure 2 , image 3 The automatic analyzer shown is tested.
[0035]Concentration column: section diameter φ5mm, column length 80mm, column packing 23 is spherical cellulose metal adsorbent. The technological steps of preparing the spherical cellulose metal adsorbent include preparation of viscose, preparation of cellulose beads, grafting reaction, crosslinking and saponification reaction. (1) Preparation of viscose: immerse cotton with a moisture content of 10% in 18% NaOH solution at 50°C for 30 minutes, then press to remove the lye, and place the cotton that has been pressed out of lye in 12% NaOH solution at 20-25°C Immerse again for 20 minutes, suction filter, and squeeze until it is nearly dry. The ratio of the immersion bath (the ratio of the absolute dry weight of the pulp to the lye) for the two immersions is 1:20; Aging at 20~25°C for 48 hours, then according to cellulose (c...
Embodiment 3
[0045] This embodiment analyzes trace metal elements in seawater, using figure 1 , figure 2 , image 3 The automatic analyzer shown is tested.
[0046] Concentration column: section diameter φ5mm, column length 60mm, column packing 23 is iminodiacetic acid macroporous adsorption resin (commercially available).
[0047] Cleaning solution: 0.4mol / L ammonium acetate solution and deionized water.
[0048] Desorption solution: 0.1mol / L HNO 3 solution.
[0049] Low-pressure chromatographic separation column: a low-pressure cationic column packing with a cross-sectional diameter of φ5mm, a column length of 60mm, and an exchange capacity of 0.04mmol / g.
[0050] Eluent: same as Example 1.
[0051] Post-column reaction solution: the same as in Example 1.
[0052] Pump flow: 0.5~1.0ml / min Working pressure: 2~3×10 5 Pa
[0053] Analysis process: 1. Operate the instrument, pump the measured estuary water into the concentration column 12 through the low-pressure pump 13, so that t...
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Abstract
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