35results about How to "Suitable for field testing" patented technology

The invention discloses a method for detecting the acute toxicity of water environment by using ATP bioluminescence. The method comprises the following steps: an ATP reaction reagent, luciferase, an ATP standard sample, and a water body to be detected are sequentially added in a reaction test tube, placing the reaction test tube in an ATP fluoroscope testing instrument to detect fluorescence intensity, the detection response time is 30s and the detection is served as an experimental group; the standard sample is replaced by distilled water, the detection is served as a control group; the experimental group and the control group are repeatedly detected for three times; and the toxicity of the water body is judged by calculating relative luminance K. The method of the invention has the characteristic of stable and sensitive test effect; and the effect of a luminescent bacteria test can be reached within 3 min of the testing time at most; and the response on organic toxic substances is more sensitive than the luminescent bacteria. In the invention, a portable ATP handholding instrument with a direct current power supply is adopted, thus the ATP handholding instrument is convenient to be carried and is suitable for site test.

The invention discloses a spot low-voltage power line carrier channel noise testing system and a method thereof. Noise testing of a time domain and a frequency domain is carried out through a specially-designed coupler and a high-speed and multichannel data acquisition card, time domain waveform display of noise signals is achieved through testing software in a laptop, fast Fourier transform algorithm (FFT) is carried out on time domain data through the software, and noise frequency domain waveform (power spectral density) is obtained. When the waveform is observed, computer date storage resources can be used at the same time to carry out long-time data storage and monitoring so that recording, analyzing and assessing on low-voltage power line noise characteristics can be achieved. Meanwhile, the spot low-voltage power line carrier channel noise testing system and the method thereof have the advantages of being flexible, convenient and fast, and suitable for various low-voltage power line environments.

The invention provides a novel color-developing agent luminosity analytical method for measuring hydrogen cyanide content in mainstream smoke quickly, which comprises the following steps of: pretreating a sample in which hydrogen cyanide in the mainstream smoke is collected, adding a color-developing agent, and quantifying by a luminosity analytical method, wherein the color-developing agent is 4-nitrobenzaldehyde and o-dinitrobenzene; preparing potassium cyanide (KCN) solution which is added with the color-developing agent and has different concentrations to make a standard curve; and quantifying the standard curve by an external standard method, adding the color-developing agent in a cigarette absorption liquid sample, and performing photometry detection at wavelength 533 nm by an ultraviolet spectrophotometer. In the method adopting the color-developing agent containing 4-nitrobenzaldehyde-o-dinitrobenzene, the selectivity and sensitivity are high, a reaction is completed instantaneously and the interference resistant capacity is high. In addition, the method is simple in operation, cigarette sidestream smoke can be detected, the HCN in smoke environment also can be analyzed qualitatively and semiquantitatively, and the method is also suitable for field detection.

The invention provides an acute toxicity algae infrared testing method of toxic and harmful substances, which adopts the sensitive algae liquid with the chlorophyll content not less than 4.0mg.L-1 and the toxicity test factors of a portable infrared thermometer. The contrast toxicity test is carried out by selecting the processing and concentration design of a test sample, the response dose and the minimum response concentration of the sensitive algae to the sample are determined by the sample dilution concentration and the adding amount of a first-appeared temperature response during the dilution concentration test of using different samples for response temperature difference and response time so as to determine the toxicity of the sample. The sensitivity of the method of the invention can achieve the sensitivity of a luminous bacteria method, the average testing time of the method and the average testing time of the luminous bacteria method are similar, the testing effect ofthe acute toxicity algae infrared testing method of the toxic and harmful substances is the same with the testing effect of the luminous bacteria method. The invention is characterized by convenient test, low cost, strong specificity, field test and so on.

The invention relates to the technical field of transformer substation protection devices, and specifically relates to a method for realizing device test protection through recording and playback. The method comprises the following steps: (1) the typical failure waveform question bank establishment process: 1) protection is classified according to logical functions specified by IEC61850; 2) and a corresponding typical failure waveform is recorded for each type of protection through an IED detect detector, and a test question bank is generated for an anticipated action of the corresponding failure waveform is inputted manually; (2) and the test process: 1) an appropriate test question bank is selected according to the logical function classification of the tested protection; 2) the protection is connected to the IED detect detector, and a synchronous clock is connected; 3) the test question bank is played back by the IED detect detector, and the action output of the tested protection is received by the IED detect detector; 4) and the action of the tested protection is compared with the anticipated action in the test question bank to judge the test result. The method of the invention has advantages of low cost and convenience, the protection device has advantages of small size and easy carry, so the protection device is suitable for the field tests of various transformer substations, so that advantages of easy utilization and easy operation can be realized.

The invention discloses a color developing agent for copper ion colorimetry, a copper ion colorimetric sensor, a use method and application thereof, and belongs to the technical field of heavy metal detection. The purpose is to provide a color developer for copper ion colorimetry, a sensor for copper ion colorimetry, and a method and application thereof with low cost, simple operation and no need for detection equipment. The color developer used in the copper ion colorimetric method of the present invention includes a quantum dot solution, and the quantum dot solution is an aqueous solution of quantum dots. The copper ion colorimetric sensor of the present invention comprises a housing, a reaction vessel and a light source; the light source and the reaction vessel are arranged in the housing; the reaction vessel is located at the bottom of the housing, and the light source is located above the reaction vessel; A plurality of reaction tanks are provided; the light source is a light source containing ultraviolet light with a wavelength less than 350nm. The copper ion colorimetric method sensor provided by the invention has low cost, simple operation, can perform qualitative detection without detection equipment, and has ultra-high sensitivity.

The invention discloses an intelligent switch large-power current source system for an electronic transformer. The system comprises a three-phase rectifier circuit, an IGBT array inverter circuit anda current closed-loop control circuit. The three-phase rectifier circuit and the current closed-loop control circuit are connected with the IGBT array inverter circuit; the three-phase rectifier circuit carries out rectification, energy storage and voltage reduction processing on externally-input three-phase alternating current, and provides a DC bus voltage for the system; the stored electric energy is subjected to SPWM modulation through the IGBT array inverter circuit to output a constant current; and the current closed-loop control circuit adjusts output voltage according to load change information and realizes a current closed-loop control strategy. The system realizes the technical effects of steady and transient characteristic test of the electronic transformer.

The invention relates to a kit for rapidly diagnosing peach bacterial shot hole, and belongs to the technical field of plant protection. The kit comprises an RPA primer pair, a specific crRNA and a single-stranded DNA probe; the sequence of the RPA primer pair is as shown in SEQ ID NO.1-2, the sequence of the specific crRNA is as shown in SEQ ID NO.3, and the sequence of the single-stranded DNA probe is as shown in SEQ ID NO.4 and/or SEQ ID NO.5. The kit is used for detecting the main pathogenic bacteria Xap of the peach bacterial shot-hole disease on the basis of an RPA technology and a Crispr/Cas system, visual detection is realized through a transverse flow detection test strip and a miniature ultraviolet flashlight, the kit is simple and flexible, low in cost, high in sensitivity and high in specificity, a user can freely select the kit, the problem that the kit cannot be used in some scenes is effectively solved, and the method has a good application prospect in the field of peach disease diagnosis and monitoring.

The invention discloses a constant-temperature detection method for identifying lactobacillus brevis as well as a special primer and a kit thereof. The specific primer group provided by the inventionis composed of a primer F3, a primer B3, a primer FIP, a primer BIP, a primer LF and a primer LB, and the six primers are sequentially shown as sequences 2-7 in a sequence table. The application of the specific primer group is as follows (b1) or (b2): (b1) identifying or assisting in identifying lactobacillus brevis; (b2) detecting whether the to-be-detected sample contains lactobacillus brevis ornot. The specific gene segment of lactobacillus brevis is amplified by using a loop-mediated isothermal amplification technology, the blank of the LAMP detection method of lactobacillus brevis in beer is filled, and the detection method has the advantages of strong specificity, simplicity in operation, rapidness, convenience and the like, can be used for beer quality monitoring, and is suitable for basic application and on-site rapid detection of winery.