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A phosphate and detection chip technology, applied in the field of analysis and detection, can solve the problems of high import price, color and turbidity interference measurement, etc., and achieve the effect of low price, fast detection method, and convenient portability
Inactive Publication Date: 2013-01-16
上海绿帝环保科技有限公司
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Problems solved by technology
At present, foreign countries (such as Germany, Japan, etc.) have developed colorimetric detection test papers and test tubes with relatively high sensitivity, but most of them are solution color development, the local color and turbidity of the sample will interfere with the determination, and the import price is high
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Embodiment 1
[0018] Test piece stability
[0019] A storage time experiment was performed on the phosphate rapid test tablet to determine the stability of the test tablet. The phosphate test tablets were stored for 5, 10, 20, 30, 45, 60, and 90 days, respectively, and the 0, 1, and 5 mg / kg phosphorus standard solutions were measured. There was no significant change in color contrast, and the phosphate rapid test tablet was effective within 90 days.
Embodiment 2
[0021] water sample testing
[0022] Take 10 ml of domestic sewage and Huangpu River water samples in a 20 ml colorimetric bottle, soak the test piece in it, shake the reaction bottle gently, and compare its color with the standard color after 10 minutes (ambient temperature 15 °C). The phosphate concentrations of the water samples were 0.5 and 2 mg / kg, respectively. However, the two water samples were measured by ammonium molybdate-antimony potassium tartrate-ascorbic acid spectrophotometry, a classical method for detecting phosphate, and the phosphate concentrations were 0.45 and 2.12 mg / kg, respectively, which were consistent with the results measured by the test piece, indicating that the The results of semi-quantitative determination of phosphate rapid test tablets are reliable.
Embodiment 3
[0024] Soil sample testing
[0025] Take 1 gram of dry soil powder into a 20ml colorimetric bottle, pour 10ml of commercially available mineral water, shake the bottle for 1 to 2 minutes, soak the test piece in it, shake the reaction bottle gently, and after 10 minutes (ambient temperature 15°C) The surface color is compared with the standard color, and it is estimated that the available phosphorus content of the soil sample is 10 mg / kg. The soil sample was determined by the classical method of detecting phosphate, ammonium molybdate-antimony potassium tartrate-ascorbic acid spectrophotometry, and the available phosphorus content was 12 mg / kg, which was consistent with the result measured by the test piece, indicating that the measurement result of the phosphate rapid test piece believable.
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Abstract
The invention relates to a technology for the onsite semi-quantitative detection of the concentration of phosphates in water or soil, and concretely relates to a rapid phosphate detection tablet. The rapid phosphate detection tablet comprises a three-layer structure, the upper layer is a molybdate-containing chromogenic layer, the middle layer is a paraffin isolation layer, the lower layer is a reaction layer containing a reducing agent, and the tablet having a thickness of 5-6mm and a diameter of 8-20mm is prepared by a tablet press, is preserved in a sealing and photophobic manner and has an effective period of three months. The use method of the tablet comprises the following steps: immersing the rapid phosphate detection tablet in 10ml of a water sample or a soil dispersion liquid, mixing for 5-20min, contrasting the upper layer of the detection tablet with phosphate standard color columns, and estimating the concentration of the phosphates. The rapid phosphate detection tablet is suitable for the detection of the phosphates in domestic sewage, industrial wastewater, soil and the like, the background color and the turbidity of the sample have small influences on the detection result, and the tablet has the characteristics of convenient carrying, low price and the like, and provides a simple and rapid method for detecting the phosphates in water and the effective phosphorous in farmlands.
Description
technical field [0001] The invention relates to a preparation of a phosphate rapid detection sheet and a use method thereof, belonging to the technical field of analysis and detection. Background technique [0002] With the rapid development of industrial technology, sudden environmental pollution accidents continue to increase, threatening human health, destroying the ecological environment, and seriously restricting the ecological balance and social and economic development. There are many problems that need to be solved urgently to prevent sudden pollution accidents. The primary task is to establish emergency monitoring methods and technologies. Once a pollution accident occurs, it can be quickly put into monitoring, and accurate pollution data can be provided in the shortest time. measures to provide a scientific basis. Therefore, for sudden environmental pollution accidents with strong temporal and spatial characteristics and significant random changes, a timely and ac...
Claims
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Application Information
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