Organic standard solution low-temperature preparation device
By designing the low-temperature preparation device of organic standard solution with automatic sampler and electric shock, the problems of high labor intensity, low accuracy and safety hazards in traditional manual preparation are solved, and efficient, accurate and safe standard solution automation is achieved. Preparation significantly improves work efficiency and safety.
Patent Information
- Application Number
- CN202420824658.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-04-19
AI Technical Summary
The manual preparation of traditional organic standard solutions has problems such as high labor intensity, long preparation time, low accuracy, high labor costs and great safety hazards, especially due to the need for manual operation and multiple sampling, which lead to cross-contamination and solvent volatility.
A low-temperature preparation device for organic standard solutions including automatic sampler, reagent bottle fixing rack, electric shock and water-cooled circulation machine was designed. The automatic sampler and electric shock were used to realize automatic dilution, cleaning and mixing of the solution. , the water-cooled circulation machine maintains a low temperature environment to reduce solvent volatility and errors.
Improve the preparation efficiency and accuracy, save labor costs, eliminate safety hazards, and realize efficient and safe automatic preparation of standard solutions. The preparation accuracy is greater than 99.9%, no loss, customization speed can be customized, and bottle shortage and System blocking alarm function.
Smart Images
Figure CN222324947U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of environmental monitoring, in particular to a low-temperature preparation device for an organic standard solution. Background Art
[0002] Organic pollutants in the environment, such as dioxins, act as environmental hormones and their presence in the environment is 10 -12 ~10 -9 Due to the complex environmental matrix, the detection technology, analytical instruments and quality control requirements for such pollutants are very high. As part of quality control, standard curves should be drawn before detection of such substances, and corresponding standard solutions should be added to samples during the detection process. For organic pollutants such as dioxins, commercial standard solutions including standard curve series are already available for sale, but for other organic pollutants such as polybrominated biphenyls, standard solution series need to be prepared manually. Since there are many types of stock solutions and their concentrations are not the same, the preparation of standard solutions usually includes two processes: single-standard dilution and single-standard mixing. In order to prevent cross-contamination, the preparation process requires the use of multiple organic solvents to repeatedly clean the pipette needle, which has the problems of high labor intensity and long preparation time; because the manual preparation process requires multiple samplings, there is a problem of low preparation accuracy; and in order to avoid errors, the preparation process usually requires two people to cooperate, which increases labor costs; the preparation process requires human contact with such organic matter, the operation safety is low, and there are certain safety hazards. In addition, organic solvents are used in the preparation process, and there is a problem of solvent volatilization. Therefore, in order to ensure the accuracy, operability and safety of the prepared solution, improve the preparation efficiency and save labor costs, it is necessary to develop an automatic preparation device for such organic standard solutions. Summary of the invention
[0003] The technical problem to be solved by the utility model is to provide a low-temperature preparation device for organic standard solutions. The device overcomes the defects of the traditional manual preparation of organic standard solutions, has a simple structure, is easy to operate, replaces the manual preparation of standard solutions, improves work efficiency and accuracy, saves labor costs, and eliminates safety hazards.
[0004] In order to solve the above technical problems, the utility model provides a low-temperature preparation device for an organic standard solution, comprising an automatic sampler, a reagent bottle fixing frame, an electric oscillator, a water-cooling circulation machine and a host computer. The automatic sampler comprises an injection arm and an injection needle, the injection needle is arranged on the injection arm, the reagent bottle fixing frame is arranged below the automatic sampler, the electric oscillator is arranged on one side of the reagent bottle fixing frame, the water-cooling circulation machine maintains a low-temperature state in the electric oscillator through a condenser arranged in the electric oscillator, and the host computer controls the injection arm through electric drive to make the injection needle move longitudinally and transversely, and absorb the solution in the reagent bottle in the reagent bottle fixing frame.
[0005] Furthermore, the reagent bottle fixing frame is provided with a plurality of reagent bottle holes arranged in a row along the longitudinal direction and the transverse direction.
[0006] Furthermore, the front panel of the electric oscillator is provided with a visible sealed window, a speed regulating knob and a timing knob.
[0007] Furthermore, a heat-insulating cotton layer is provided on the inner wall of the electric oscillator, and the condensing tubes are arranged side by side in a U-shape inside the heat-insulating cotton layer.
[0008] Since the low-temperature preparation device of organic standard solution of the utility model adopts the above technical scheme, that is, the device includes an automatic sampler, a reagent bottle holder, an electric oscillator, a water-cooled circulation machine and a host computer, the automatic sampler includes a sample injection arm and a sample injection needle, the sample injection needle is arranged on the sample injection arm, the reagent bottle holder is arranged below the automatic sampler, the electric oscillator is arranged on one side of the reagent bottle holder, the water-cooled circulation machine maintains the low temperature state in the electric oscillator through the condenser arranged in the electric oscillator, and the host computer controls the sample injection arm through electric drive to make the sample injection needle move longitudinally and transversely, and absorb the solution in the reagent bottle in the reagent bottle holder. The device overcomes the defects of the traditional preparation operation of organic standard solution, has a simple structure, is easy to operate, replaces the manual preparation operation of standard solution, improves the operation efficiency and accuracy, saves labor costs, and eliminates safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples:
[0010] Figure 1 This is a schematic diagram of the structure of the low-temperature preparation device for organic standard solutions of the utility model;
[0011] Figure 2 This is a top view of the reagent bottle holder in this device. DETAILED DESCRIPTION
[0012] Implementation example Figure 1 As shown, the low-temperature preparation device of organic standard solution of the utility model comprises an automatic sampler 1, a reagent bottle holder 2, an electric oscillator 3, a water-cooling circulation machine 4 and a host computer 5, wherein the automatic sampler 1 comprises an injection arm 11 and an injection needle 12, wherein the injection needle 12 is arranged on the injection arm 11, the reagent bottle holder 2 is arranged below the automatic sampler 1, the electric oscillator 3 is arranged on one side of the reagent bottle holder 2, the water-cooling circulation machine 4 maintains the low temperature state in the electric oscillator 3 through a condenser 41 arranged in the electric oscillator 3, and the host computer 5 controls the injection arm 11 through electric drive to make the injection needle 12 move longitudinally and transversely, and absorb the solution in the reagent bottle 21 in the reagent bottle holder 2.
[0013] Preferably, Figure 2As shown, the reagent bottle fixing frame 2 is provided with a plurality of reagent bottle slots 22 arranged in a longitudinal and transverse manner. The reagent bottle slots can be arranged in a 5×10 arrangement, and 50 reagent bottles can be placed.
[0014] Preferably, the front panel of the electric oscillator 3 is provided with a visible sealed window 31 , a speed adjustment knob 32 and a timing knob 33 .
[0015] Preferably, the inner wall of the electric oscillator 3 is provided with a heat-insulating cotton layer, and the condensing tubes 41 are arranged side by side in a U-shape in the heat-insulating cotton layer.
[0016] This device includes a low temperature system, a standard solution preparation system and a mixing system. Before use, first turn on the low temperature system consisting of a water cooling cycle machine and a condenser tube, and circulate condensed water to keep the inside of the electric oscillator at a low temperature. The standard solution preparation system can select the corresponding standard sample preparation program through the host computer according to the user's preparation requirements. The injection arm and injection needle automatically complete the standard solution dilution and injection needle cleaning process. Finally, the vortex mixing method of the electric oscillator is used to mix the prepared standard solution. This device is used for the automated preparation of laboratory organic standard solutions.
[0017] The temperature of the water-cooled circulation machine in this device is set at 4°C. The temperature inside the electric oscillator is maintained at 4°C through the cooled circulating condensed water, reducing the preparation error caused by solvent evaporation during the preparation process. The condenser tube uses a stainless steel tube with a radius of 0.5cm. The power of the water-cooled circulation machine is 2.4KW, the temperature control accuracy is ±1°C, and the water flow rate is 1.5-3.0 m 3 / h, the water outlet pressure is 0.15-0.25Mpa, and it runs continuously for 24 hours.
[0018] The standard solution preparation system consists of an injection arm, an injection needle, a reagent bottle holder and a host computer. First, the host computer sends instructions (including position information and preparation program), the injection arm controls the movement of the injection needle, and the injection needle absorbs a quantitative dilution solvent according to the preparation program instructions and injects it into the standard solution bottle, and then absorbs a quantitative standard solution and injects it into the standard solution bottle. After completion, the injection needle absorbs 25ul of acetone, n-hexane, and dichloromethane to clean the injection needle three times each. After cleaning, the injection needle is reset and ready to enter the standard solution mixing program.
[0019] Remove the standard solution bottle from the reagent bottle holder, manually place the bottle cap, select the rotation speed and time of the electric oscillator, start the rotation button, and it will stop automatically after the rotation is completed. The electric oscillator has a speed of 0-5000rpm; the amplitude is 4mm horizontal rotation; the maximum processing capacity is 50 samples, and it can achieve multi-position mixing in one unit; the oscillation method is multi-position vortex mixing; the timing range is 0-1min; the motor type is a brushless DC motor.
[0020] The accuracy of the standard solution prepared by this device is greater than 99.9%, the RSD of lossless injection is less than 0.5%, and automatic protection functions such as bottle shortage alarm and system blockage alarm can be set; the needle speed can be customized, and it can replace manual preparation of standard solutions, greatly improving work efficiency, saving time and labor costs. Compared with manual preparation, it has higher accuracy and is equipped with a low-temperature system to ensure a low-temperature environment during the preparation process, prevent preparation errors caused by solvent volatilization, improve the safety of preparation operations, and eliminate safety hazards.
Claims
1. A low temperature preparation device for organic standard solutions, characterized in that: The device comprises an automatic sampler, a reagent bottle fixing frame, an electric oscillator, a water-cooling circulation machine and a host computer. The automatic sampler comprises a sample injection arm and a sample injection needle. The sample injection needle is arranged on the sample injection arm. The reagent bottle fixing frame is arranged below the automatic sampler. The electric oscillator is arranged on one side of the reagent bottle fixing frame. The water-cooling circulation machine maintains a low temperature state in the electric oscillator through a condenser arranged in the electric oscillator. The host computer controls the sample injection arm through electric drive to make the sample injection needle move longitudinally and transversely and absorb the solution in the reagent bottle in the reagent bottle fixing frame.
2. The low temperature preparation device for organic standard solution according to claim 1, characterized in that: The reagent bottle fixing frame is provided with a plurality of reagent bottle holes and grooves arranged in a longitudinal and transverse direction.
3. The low temperature preparation device for organic standard solution according to claim 1 or 2, characterized in that: The front panel of the electric oscillator is provided with a visual airtight window, a speed regulating knob and a timing knob.
4. The low temperature preparation device for organic standard solution according to claim 3, characterized in that: The inner wall of the electric oscillator is provided with a heat-insulating cotton layer, and the condensing tubes are arranged side by side in a U shape in the heat-insulating cotton layer.