37results about How to "Sampling is simple" patented technology

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 an?ecological soil sampler, and in order to solve the problems of difficult sample output after sampling, easy disturbance of soil layers, easy change of soil biological patterns and easy biomass loss existing in existing soil collectors, the invention further provides a completely split type rapid ecological soil sampler. Two plug pins are inserted into two jacks correspondingly to fixedly connect a first semicylindrical body and a second semicylindrical body into a complete sampling cylinder. Two inverted L-shaped sockets that are centrosymmetric with respect to a socket pipe cap central axis are processed on the lower outer wall of a socket pipe cap. A handle is in threaded connection with the upper end of an upright pipe through a second pipe hoop, and the upright pipe lower end is fixedly connected to the center of the socket pipe cap upper end. The upper end of the sampling cylinder is sheathed on the lower end inner wall of the socket pipe cap, and a first cylindrical pin and a second cylindrical pin are respectively clamped in the two inverted L-shaped sockets of the socket pipe cap. The ecological soil sampler provided in the invention is used for collecting ecological soil samples.

The invention discloses a method for detecting clenbuterol residue in hair. The method sequentially comprises the following steps: (1) pre-processing a hair sample: hydrolyzing the sample with alkali at a high temperature, extracting the sample with an organic solvent and reversely extracting the sample with acid water; and (2) taking deuterated clenbuterol-D9 aqueous solution with the concentration of 5-500ng / ml as an internal standard, and detecting the clenbuterol residue in hair by liquid chromatogramy-tandem mass spectrometry. The method has the following advantages: 1. hair is taken as a detection material, which provides easy sampling, convenient storage and repeatable sampling, sampling is simple and rapid and has trace amount and high efficiency; 2. the pre-processing method of the hair sample is optimized, which shortens the pre-processing time, simplifies the processing steps and obviously reduces the cost; and 3. an isotopic compound is taken as the internal standard, and the liquid chromatogramy-tandem mass spectrometry is used as a detection means, the minimum detection limit reaches 0.01ng / g, and the minimum quantification limit is 0.5ng / g. The method has the accurate and reliable capacity to qualitatively and quantitatively detect the clenbuterol, and can be taken as a tool for large sample screening or small sample confirmation.