A microwave driven acid chasing device with end point volume setting

Abstract

A microwave-assisted acid removal device with endpoint volume control includes a lower plate and an upper plate. The upper plate is positioned parallel above the lower plate, and the lower and upper plates are fixedly connected by several support rods. The lower and upper ends of the support rods are fixedly connected to the lower and upper plates, respectively. At least two shielding components are fixedly mounted on the upper surface of the lower plate. Each shielding component includes an outer sleeve and a metal shielding tube. The metal shielding tube is coaxially disposed within the outer sleeve, and its outer wall is attached to the inner wall of the outer sleeve. An opening is provided at the upper end of the outer sleeve. The upper plate has through holes equal in number to the number of shielding components. Utilizing the microwave reflection property of metal, when the sample volume in the concentration tube is lower than that in the metal shielding tube, the microwave energy no longer affects the sample in the concentration tube. At this point, the sample in the concentration tube will no longer evaporate, thus achieving the purpose of endpoint control.

Description

Technical Field

[0001] This utility model relates to the field of physics, and in particular to microwave sample concentration technology, especially a microwave acid-carrying device that can achieve endpoint volume determination. Background Technology

[0002] Microwave digestion is one of the best sample pretreatment methods available today. It can increase the digestion speed by 20-100 times. However, the digested sample contains a high concentration of acid, or certain acids may damage the subsequent detection equipment. Therefore, it is necessary to reduce the acid concentration in the digestion solution by "acid removal".

[0003] Using common heating equipment (water bath, electric furnace, electric heating plate, etc.) for heating and evaporation, completing one acid removal cycle takes 2-4 hours, and continuous monitoring is required in the later stages to prevent drying out. Vacuum acid removal equipment suffers from uneven heating, poor temperature control, and varying negative pressure at different locations, all of which can cause different sample concentration rates at different locations. Without individual switches to control the concentration of each sample tube, this can easily lead to inconsistent acid removal efficiency at different locations, affecting the experimental process and increasing safety risks. Utility Model Content

[0004] The purpose of this invention is to provide a microwave acid removal carrier device with endpoint volume control, which solves the technical problems of different acid removal efficiencies of samples at different positions and difficulty in controlling the concentration endpoint in existing vacuum acid removal equipment.

[0005] This utility model provides a microwave acid removal bearing device with end-point volume determination, including a lower plate and an upper plate. The upper plate is arranged parallel above the lower plate. The lower plate and the upper plate are fixedly connected by several support rods. The lower end and upper end of the support rods are fixedly connected to the lower plate and the upper plate, respectively. At least two shielding components are fixedly arranged on the upper surface of the lower plate. Each shielding component includes an outer sleeve and a metal shielding tube. The outer sleeve is fixedly connected to the lower plate. The metal shielding tube is coaxially arranged in the outer sleeve. The outer wall of the metal shielding tube is attached and fixed to the inner wall of the outer sleeve. An opening is provided at the upper end of the outer sleeve. The upper plate has through holes equal in number to the number of shielding components. The through holes are coaxially arranged and correspond one-to-one with the shielding components.

[0006] Furthermore, a concentration tube is provided in the through hole of the upper plate, and a tail tube is coaxially connected to the lower end of the concentration tube. The tail tube is connected to the concentration tube, and the diameter of the tail tube is smaller than the diameter of the concentration tube. The tail tube is set inside the metal shielding tube, and the outer diameter of the tail tube is matched with the inner diameter of the metal shielding tube, and the length of the tail tube is matched with the length of the metal shielding tube.

[0007] Furthermore, the inner diameter of the metal shielding tube is 1 mm larger than the outer diameter of the tail tube.

[0008] Furthermore, the contents of the tail tube are 2ml, 1.5ml, 1ml or 0.5ml.

[0009] Furthermore, the metal shielding tube is a stainless steel tube.

[0010] Compared with existing technologies, the advantages of this invention are positive and significant. By utilizing the microwave reflection properties of metal, when the sample volume in the concentration tube is lower than that in the metal shielding tube, microwave energy no longer affects the sample in the concentration tube. At this point, the sample in the concentration tube will no longer evaporate, thus achieving the purpose of controlling the endpoint. Attached Figure Description

[0011] Figure 1 This is a cross-sectional schematic diagram of a microwave acid-carrying support device with end-point volume determination according to the present invention.

[0012] Figure 2 This is a three-dimensional schematic diagram of a microwave acid-carrying support device with endpoint volume determination according to the present invention.

[0013] Figure 3 This is a schematic diagram of the shielding component in a microwave acid removal carrier device with end-point quantification according to the present invention.

[0014] Figure 4 This is a schematic diagram of the concentration tube in a microwave acid removal carrier device with endpoint volume determination according to this utility model. Detailed Implementation

[0015] The present invention will be further described below with reference to embodiments, but the present invention is not limited to these embodiments. Any similar variations using the present invention should be included within the protection scope of the present invention. The use of directions such as up, down, front, back, left, right, center, inside, and outside in the present invention is only for the convenience of clear description and is not intended to limit the technical solution of the present invention.

[0016] like Figures 1-4As shown, this utility model provides a microwave acid removal bearing device with end-point volume determination, including a lower plate 1 and an upper plate 2. The upper plate 2 is arranged parallel above the lower plate 2. The lower plate 1 and the upper plate 2 are fixedly connected by a number of support rods 3. The lower end and the upper end of the support rods 3 are fixedly connected to the lower plate 1 and the upper plate 2, respectively. At least two shielding components 4 are fixedly arranged on the upper surface of the lower plate 1. Each shielding component 4 includes an outer sleeve 5 and a metal shielding tube 6. The outer sleeve 5 is fixedly connected to the lower plate 1. The metal shielding tube 6 is coaxially arranged in the outer sleeve 5. The outer wall of the metal shielding tube 6 is attached and fixed to the inner wall of the outer sleeve 5. An opening is provided at the upper end of the outer sleeve 5. The upper plate 2 is provided with a number of through holes 7 equal to the number of shielding components 4. The through holes 7 are coaxially arranged and correspond one-to-one with the shielding components 4.

[0017] The sample liquid is poured into the concentration tube 8, which is then placed into the through hole 7 of the upper plate 2, with the lower end of the concentration tube 8 entering the shielding assembly 4. The entire device with the concentration tube 8 installed is placed in the microwave oven cavity and heated with microwaves. The sample begins to evaporate rapidly under the microwave energy. Utilizing the property of metal reflecting microwaves, when the liquid level of the sample in the concentration tube 8 is lower than the upper end of the metal shielding tube 6, the microwave energy no longer affects the sample in the concentration tube 8. At this point, the sample in the concentration tube 8 will stop evaporating, thus achieving the purpose of controlling the endpoint.

[0018] This microwave acid removal device, used in conjunction with a microwave oven for concentration, can concentrate 40 samples at a time, with a maximum single run time of 30 minutes.

[0019] Furthermore, a concentration tube 8 is provided in the through hole 7 of the upper plate 2. A tail tube 9 is coaxially connected to the lower end of the concentration tube 8, communicating with the concentration tube 8. The diameter of the tail tube 9 is smaller than that of the concentration tube 8. The tail tube 9 is located inside the metal shielding tube 6, with its outer diameter matching the inner diameter of the metal shielding tube 6, and its length matching the length of the metal shielding tube 6. By providing a tail tube 9 with a smaller diameter, it is beneficial for precise control of the sample quantity.

[0020] Furthermore, the inner diameter of the metal shielding tube 6 is 1 mm larger than the outer diameter of the tail tube 9.

[0021] Furthermore, the contents of the tail tube 9 are 2ml, 1.5ml, 1ml, or 0.5ml, with variations in diameter for the same length. Simultaneously, the metal shielding tube 6 and the outer casing 5 also come in multiple sizes: 2ml, 1.5ml, 1ml, and 0.5ml, to meet various needs.

[0022] Furthermore, the metal shielding tube 6 is a stainless steel tube.

Claims

1. A microwave acid-carrying support device capable of final volume determination, characterized in that, The device includes a lower plate and an upper plate. The upper plate is arranged parallel above the lower plate. The lower plate and the upper plate are fixedly connected by several support rods. The lower and upper ends of the support rods are fixedly connected to the lower plate and the upper plate, respectively. At least two shielding components are fixedly arranged on the upper surface of the lower plate. Each shielding component includes an outer sleeve and a metal shielding tube. The outer sleeve is fixedly connected to the lower plate. The metal shielding tube is coaxially arranged in the outer sleeve. The outer wall of the metal shielding tube is attached and fixed to the inner wall of the outer sleeve. The upper end of the outer sleeve is provided with an opening. The upper plate is provided with a number of through holes equal to the number of shielding components. The through holes are coaxially arranged and correspond one-to-one with the shielding components.

2. The microwave acid-carrying support device with endpoint volume determination according to claim 1, characterized in that: A concentration tube is installed in the through hole of the upper plate. A tail tube is coaxially connected to the lower end of the concentration tube. The tail tube is connected to the concentration tube. The diameter of the tail tube is smaller than that of the concentration tube. The tail tube is installed inside the metal shielding tube. The outer diameter of the tail tube is matched with the inner diameter of the metal shielding tube. The length of the tail tube is matched with the length of the metal shielding tube.

3. The microwave acid-carrying support device with endpoint volume determination according to claim 2, characterized in that: The inner diameter of the metal shielding tube is 1 mm larger than the outer diameter of the tail tube.

4. The microwave acid-carrying support device with endpoint volume determination according to claim 2, characterized in that: The contents of the tail tube are 2ml, 1.5ml, 1ml or 0.5ml.

5. The microwave acid-carrying support device with endpoint volume determination according to claim 1, characterized in that: The metal shielding tube is made of stainless steel.

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