Apparatus and method for optical detection of ammonia nitrogen in water samples
An optical detection and water sample technology, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of low degree of automation, achieve high degree of automation, reduce the lower limit of detection of ammonia nitrogen, and have good reliability
Active Publication Date: 2016-03-23
INST OF ELECTRONICS CHINESE ACAD OF SCI
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However, the portable photoelectric ammonia detection device has a low degree of automation and requires detection personnel to be on duty
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[0067] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. Implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values within acceptable error margins or design constraints. In addition, the directional terms mentioned in the following embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., are only referring t...
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Abstract
The invention provides a water sample ammonia nitrogen optical detection apparatus and a method. The water sample ammonia nitrogen optical detection apparatus comprises a sample chamber, a test chamber, an air pump, an automatic liquid injection system and a signal processing chip; the sample chamber and the test chamber are in sealed connection by a gas-guide tube and the air pump; and the sample chamber and the automatic liquid injection system are in sealed connection via a liquid-guide tube. A to-be-detected water sample and a NaOH aqueous solution are injected into the sample chamber according to a preset program by the automatic liquid injection system, ionic ammonia nitrogen in the water sample is converted into ammonia gas, the ammonia gas is circularly introduced to the test chamber by the air pump, so that the color of an ammonia sensitive element in the test chamber is changed, a photoelectric detector detects the light intensity variation of a light source penetrates the ammonia sensitive element in real time, and the signal processing chip is used to process a signal output by the photoelectric detector for obtaining the ammonia nitrogen content in the water sample. The apparatus is small in volume, light in weight, convenient to carry, low in power consumption, long in service life and high in automation degree, is capable of performing detection according to a preset program under the unmanned on duty condition, and is applicable to on-site rapid detection of water environment.
Description
technical field [0001] The invention relates to the technical field of water quality detection, and relates to an optical detection device and method for ammonia nitrogen in water samples, which can automatically and quickly measure the concentration of ammonia nitrogen in various complex water environments on site. Background technique [0002] Ammonia nitrogen is a nutrient salt pollutant in water bodies. When the content in water bodies is high, it will lead to deterioration of water quality, imbalance of ecosystems, and eutrophication hazards. It leads to the massive reproduction of algae and microorganisms, the excessive consumption of dissolved oxygen in the water, and the rate of dissolved oxygen is significantly lower than the efficiency of oxygen consumption, which eventually leads to the death of a large number of fish, and even the drying up of lakes. [0003] Due to the above-mentioned hazards of ammonia nitrogen, it is very important to quickly and accurately de...
Claims
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IPC IPC(8): G01N21/31
Inventor 祁志美李洋逯丹凤
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI