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Full-automatic nutrient salt analyzer and analysis method thereof

A nutrient salt, fully automatic technology, used in analytical materials, instruments, color/spectral property measurement, etc., can solve the problems of unreliable measurement results, mutual interference, and unmentioned silicate and phosphate determination.

Active Publication Date: 2013-10-16
BEIJING JITIAN INSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has two disadvantages: one is that cruises are generally several times a year, and the interval is longer; The spectrophotometric method is used to measure the nutrient salts in seawater. Since it is not on-site analysis, unpredictable factors will appear in the sample storage and later determination, which will lead to the unreliability of the determination results.
In the patent CN 1176381C, in order to improve the cumbersome data processing and the large amount of reagent requirements, the "reversed phase flow injection analysis technology" that injects reagents into the sample is used, but the instrument described in this patent cannot perform simultaneous determination of multiple parameters. And it does not mention the solution to the problem of mutual interference between the determination of silicate and the determination of silicate and phosphate

Method used

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  • Full-automatic nutrient salt analyzer and analysis method thereof
  • Full-automatic nutrient salt analyzer and analysis method thereof
  • Full-automatic nutrient salt analyzer and analysis method thereof

Examples

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Effect test

Embodiment 1

[0036] Fully automatic nutrient analyzer of the present invention, see figure 1 , 6 , including a reagent refrigerated warehouse 2, a constant temperature autosampler 1, a host 3, a host 3 including a peristaltic pump 4, a sample injection valve group 5 composed of 4 sample injection valves, a chemical analysis template 6, and a detector group 8, in which the reagent The refrigerated warehouse 2 is designed with 4×6 positions, and can put all the reagents required for the determination of five substances. The thermostatic autosampler 1 includes four injection needles 35, sample tray 33, cleaning tank 36, and five test tubes 34 , the chemical analysis template 6 is divided into four regions, namely nitrate nitrogen NO 3 - , nitrite nitrogen NO 2 - Analysis area, ammonia nitrogen NH 4 + Analysis area, phosphate PO 4 3- Analysis area, silicate SiO 4 2- In the analysis area, the peristaltic pump 4 includes 19 peristaltic pump tubes, the inner diameter of the peristaltic ...

Embodiment 2

[0045] Apply the full-automatic nutrient analyzer of the present invention to the nitrate nitrogen NO in seawater in detail below 3 - , nitrite nitrogen NO 2 - The working process for analysis.

[0046] One, the present embodiment nitrite nitrogen NO 2 - testing method

[0047] In this example, nitrite nitrogen NO 2 - Reagents required in the protocol of the test:

[0048] 1. The carrier is artificial seawater. Preparation of artificial seawater: 40g of sodium chloride, 0.32g of sodium bicarbonate in deionized water are dissolved and mixed to 1L.

[0049] 2. Preparation of standard samples:

[0050] (1) Weigh 4.926g of potassium nitrite (KNO 2 ) in 800ml deionized water, dilute to the mark with artificial seawater after dissolving, and shake well. Prepared as 1000mg N / L Nitrite Nitrogen NO in Nitrogen 2 - Reserve solution for later use.

[0051] (2) Add 1000mg / L of nitrite nitrogen NO 2 - The stock solution was diluted step by step with artificial seawater, and...

Embodiment 3

[0081] Apply the full-automatic nutrient analyzer of the present invention to ammonia nitrogen NH in seawater in detail below 4 + The working process of the analysis.

[0082] In this embodiment, ammonia nitrogen NH 4 + Reagents required for the test procedure:

[0083] 1. The carrier liquid is artificial seawater. Preparation of artificial seawater: 40g of sodium chloride, 0.32g of sodium bicarbonate in deionized water are dissolved and mixed to 1L.

[0084] 2. Preparation of standard samples:

[0085] (1) Weigh 3.819g of ammonium chloride NH4Cl dried at 60°C for one hour, dissolve it and dilute to the mark with artificial seawater, and shake well. Prepare 1000mg N / L ammonia nitrogen NH4+ stock solution in terms of nitrogen for future use.

[0086] (2) Dilute 1000mg / L ammonia nitrogen NH4+ stock solution step by step with artificial seawater to prepare 0.0, 20.0, 50.0, 100.0, 200.0, 500.0, 800.0, 1000.0μg N / L standard series.

[0087] 3. The pH value of the buffer solu...

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Abstract

The invention relates to a full-automatic multi-parameter nutrient salt analysis method and an apparatus for implementing the method. The apparatus adopts artificial sea water as carrying current to eliminate the matrix effect in a sea water sample due to the high salinity change, wherein the prepared NaCl concentration of the artificial sea water is the same as the NaCl concentration of the sea water; five nutritional ingredients of nitrate nitrogen NO3<->, nitrite nitrogen NO2<->, ammonia nitrogen NH4<+>, phosphate PO4<3-> and silicate SiO4<2-> can be synchronously analyzed; a unique flow path design is adopted, such that the problem of the mutual interference between the silicate and the phosphate during the determination can be avoided.

Description

technical field [0001] The invention relates to a fully automatic nutrient analyzer and the detection technology of the analysis method, especially capable of quickly measuring a large number of samples and simultaneously measuring five parameters, and mainly relates to an automatic nutrient analyzer and an analysis method. Background technique [0002] Phosphate (PO) in seawater 4 3- ), silicate (SiO 4 2- ) and inorganic nitrogen, including nitrate nitrogen (NO 3 - ), nitrite nitrogen (NO 2 - ), ammonia nitrogen (NH 4 + ) can promote the growth of phytoplankton, but if the concentration is too high, it will lead to eutrophication of seawater, which will cause serious environmental problems-red tides. The eutrophication of seawater will consume dissolved oxygen in seawater, causing animals and plants in seawater to die due to oxygen depletion, causing damage to the ecological environment. The detection of seawater nutrients is an important part of marine environmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N35/00G01N35/02G01N35/10G01N21/31
Inventor 赵萍魏月仙成耀祖肖靖泽顾爱平赵立晶常凤翥
Owner BEIJING JITIAN INSTR CO LTD
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