Automatic analyzer and automatic analysis method for various nutritive salts
An automatic analyzer and nutrient salt technology, applied in the field of nutrient salt analysis, can solve the problems of increasing the workload of packaging, transportation, and increasing equipment costs, and achieve the effects of convenient online analysis, elimination of interference, and cost reduction.
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Embodiment 1
[0029] In the present embodiment, the structure of the automatic analyzer of various nutrient salts is as follows: figure 1 As shown, it includes an optical flow cell 13, an optical detector 14, a computer processing system 15 and a liquid flow path, and the liquid flow is composed of a sample injection flow path and a reaction analysis flow path. The reaction analysis flow route is formed by connecting the first mixer 10, the first reactor 12 and the optical flow cell 13 through pipe fittings in sequence; 5, the third mixer 6, the fourth mixer 11, the second reactor 7, the reduction column 9, the first two-way solenoid valve 8, the second two-way solenoid valve 2, the third two-way solenoid valve 3 and liquid The liquid delivery tubes include chromogenic solution delivery tubes, reference solution delivery tubes, sample or standard sample delivery tubes, protection solution delivery tubes and oxidation solution delivery tubes. In the instrument, the low-pressure pump 1 is a ...
Embodiment 2
[0032] This example analyzes the NO in seawater, estuary water and industrial sewage 2 - -N, using the automatic analyzer described in Embodiment 1, the optical path of the optical flow cell 13 is 10mm, and the detection wavelength is 530nm, so that the second two-way solenoid valve 2 and the third two-way solenoid valve 3 are in a closed state, so that The first two-way solenoid valve 8 is in an open state, so that the low-pressure pump 1 is in a working state.
[0033] The operation steps of the test analysis of this embodiment:
[0034] 1. Prepare standard samples and solutions required for test analysis
[0035] (1) Preparation of standard samples
[0036] Weigh NaNO 2 (Analytical pure) Prepare 1000mg / L NO 2 - -N standard stock solution, dilute the prepared standard stock solution, and prepare a series of standard samples, each standard sample NO 2 - -N concentrations were 2.0 μg / L, 10.0 μg / L, 20.0 μg / L, 40.0 μg / L and 50.0 μg / L, respectively.
[0037] (2) Preparat...
Embodiment 3
[0050] This example analyzes the NO in seawater, estuary water and industrial sewage 3 - -N, using the automatic analyzer described in Embodiment 1, the optical path of the optical flow cell 13 is 10mm, and the detection wavelength is 530nm, so that the third two-way solenoid valve 3 and the first two-way solenoid valve 8 are in a closed state, so that The second two-way solenoid valve 2 is in an open state, so that the low-pressure pump 1 is in a working state.
[0051] 1. Prepare standard samples and solutions required for test analysis
[0052] (1) Preparation of standard samples
[0053] Weigh KNO 3 (Analytical pure) Prepare 200mg / L NO 3 - -N standard stock solution, dilute the prepared standard stock solution, and prepare a series of standard samples, each standard sample NO 3 - -N concentrations were 20 μg / L, 100 μg / L, 200 μg / L, 400 μg / L, 600 μg / L, and 1000 μg / L, respectively.
[0054] (2) Preparation of chromogenic solution R
[0055] The raw materials and meth...
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Abstract
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