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CN-224231323-U - Sample spoon for low-background micro-sampling

CN224231323UCN 224231323 UCN224231323 UCN 224231323UCN-224231323-U

Abstract

The utility model belongs to the technical field of laboratory precision sampling appliances, in particular to a sample spoon for low background micro sampling, which is formed by integrally injection molding PFA materials and comprises a handle, a main sampling part and an auxiliary sampling part, wherein the main sampling part and the auxiliary sampling part are respectively arranged at two ends of the handle, the main sampling part is of a smooth shovel structure, the width of the main sampling part gradually increases from one end which is in transition with the handle to the other end which is far away from the handle, the auxiliary sampling part is of a smooth round head structure, the auxiliary sampling part is bent from one end which is in transition with the handle to the other end which is far away from the handle to one side, the other end of the auxiliary sampling part which is far from the handle is of an arc shape, and the widest part of the auxiliary sampling part is positioned between the two ends. The functional spoon head is subjected to smooth transition treatment, is not easy to remain and convenient to clean, is of a dual-function design, can accurately sample 1-100 mg level powder, and can be used for scraping sticky samples or collecting residues on the inner wall of a container.

Inventors

  • SUN ZIWEI
  • LI CHEN
  • GONG HONGMEI
  • SUN LINGLING
  • XIAO YUANYUAN

Assignees

  • 中国科学院海洋研究所

Dates

Publication Date
20260512
Application Date
20250421

Claims (8)

  1. 1. A sample spoon for low background micro sampling is characterized in that the sample spoon is formed by integrally injection molding a PFA material and comprises a handle (2) and a functional spoon head, the functional spoon head is divided into a main sampling part (1) and an auxiliary sampling part (3), one end of the handle (2) is provided with the main sampling part (1), the other end of the handle (2) is provided with the auxiliary sampling part (3), the main sampling part (1) is of a smooth shovel structure for realizing accurate sampling, namely, the front face and the back face of the main sampling part (1) are both planes, the width of the main sampling part (1) gradually increases from one end in transition with the handle (2) to the other end far away from the handle (2), the auxiliary sampling part (3) is of a smooth round head structure for scraping sticky samples or collecting residues on the inner wall of a container, namely, the front face and the back face of the auxiliary sampling part (3) are cambered surfaces, one end of the auxiliary sampling part (3) in transition with the handle (2) is bent to one side far away from the other end of the handle (2), the width of the auxiliary sampling part (3) is the most cambered surface, and the other end of the auxiliary sampling part (3) is located between the two ends of the auxiliary sampling part.
  2. 2. The sample spoon for low background micro sampling according to claim 1, wherein the surface of the handle (2) is of an anti-slip structure.
  3. 3. The sample spoon for low background micro sampling according to claim 2, wherein the surface of the handle (2) is provided with anti-slip patterns.
  4. 4. The sample spoon for low background microsampling according to claim 1, characterized in that the handle (2) is cylindrical with a length of 150mm and a diameter of 3.5mm.
  5. 5. The sample spoon for low background micro sampling according to claim 1, wherein the main sampling part (1) is a trapezoid, an upper bottom of the trapezoid is one end in transition with the handle (2), and a lower bottom of the trapezoid is the other end far away from the handle (2).
  6. 6. The sample spoon for low background micro sampling according to claim 5, wherein the length of the main sampling part (1) is 15mm, the width of the upper base of the trapezoid is 5mm, and the width of the lower base of the trapezoid is 7mm.
  7. 7. The sample spoon for low background micro sampling according to claim 1, wherein the length of the auxiliary sampling portion (3) is 6mm, the maximum width is 5mm, and the minimum width is 3.5mm.
  8. 8. The sample spoon for low background micro sampling according to claim 1, wherein the transition area between the main sampling part (1) and the handle (2) and the transition area between the auxiliary sampling part (3) and the handle (2) are thickened to enhance mechanical strength.

Description

Sample spoon for low-background micro-sampling Technical Field The utility model belongs to the technical field of laboratory precision sampling devices, and particularly relates to a sample spoon for low-background micro sampling. Background In the fields of chemical analysis, pharmaceutical development, material science and the like, accurate weighing of a trace sample is important. Currently, when weighing small-mass powder (milligram-scale) in a laboratory, commonly used sample spoons can be classified into a micro-medicine spoon, a hair spoon, an adjustable micro-spoon, a disposable plastic spoon, a magnetic weighing sample spoon, a vibrating micro-spoon and the like. The micro-spoon is suitable for most of powder, stainless steel is not easy to deform, and has durability, but the metal spoon can adsorb light powder to react with acid/alkali, and micro-metal impurities can be separated out in a high-purity experiment to influence analysis results. The disposable plastic spoon can avoid cross contamination and has the advantage of low cost, but has limited chemical compatibility, durability and poor precision, and is difficult to control trace powder. The hair spoon can accurately scrape a 0.1 mg-level sample, the thin tip design can reduce adhesion residues, but the hair spoon is high in operation difficulty, easy to damage and not suitable for large-scale weighing, and the hair spoon is matched with a magnifying glass or a microscope for use. The adjustable micro spoon can be used for flexible quantification, has good repeatability, but has high cost, complex maintenance and larger volume. The magnetic sample ladle reduces powder drift through magnetic adsorption to realize quick transfer, but only limits magnetic samples and can influence surrounding precise instruments (such as an electronic balance). The vibration type micro spoon can automatically operate and control superfine powder, reduces human error, but has high price, complex maintenance and large volume. In addition, the traditional spoon body is large in design capacity, micro-sampling within a range of 1-100 mg is difficult to accurately control, and the design of residue prevention is lacking, so that sample loss and weighing errors are caused. Especially in the fields of semiconductors, nuclear industry and the like with extremely high requirements on cleanliness, the pollution risk and the operation inconvenience of the existing tools are more prominent. Disclosure of utility model Aiming at the problems of the traditional sample spoon, in order to meet the severe requirements of modern precision experiments on sample integrity and data accuracy, the utility model aims to provide a sample spoon for low-background micro-sampling. The aim of the utility model is realized by the following technical scheme: The sample spoon is formed by integrally injection molding a PFA material and comprises a handle and a functional spoon head, wherein the functional spoon head is divided into a main sampling part and an auxiliary sampling part, one end of the handle is provided with the main sampling part, the other end of the handle is provided with the auxiliary sampling part, the main sampling part is of a smooth shovel structure for realizing accurate sampling, namely, the front surface and the back surface of the main sampling part are both planes, the width of the main sampling part gradually increases from one end in transition with the handle to the other end far away from the handle, the auxiliary sampling part is of a smooth round head structure for scraping sticky samples or collecting residues on the inner wall of a container, namely, the front surface and the back surface of the auxiliary sampling part are cambered surfaces, the auxiliary sampling part is bent from one end in transition with the handle to the other end far away from the handle to one side, the other end of the auxiliary sampling part far away from the handle is of an arc shape, and the widest part of the auxiliary sampling part is positioned between the two ends. Wherein the surface of the handle is of an anti-skid structure. The surface of the handle is provided with anti-skid patterns. The handle is cylindrical, has a length of 150mm and a diameter of 3.5mm. The main sampling part is trapezoidal, the upper bottom of the trapezoid is one end in transition with the handle, and the lower bottom of the trapezoid is the other end far away from the handle. The length of the main sampling part is 15mm, the width of the upper bottom of the trapezoid is 5mm, and the width of the lower bottom of the trapezoid is 7mm. The length of the auxiliary sampling part is 6mm, the maximum width is 5mm, and the minimum width is 3.5mm. The transition area between the main sampling part and the handle and the transition area between the auxiliary sampling part and the handle are thickened so as to enhance the mechanical strength. The utility model has the advantages and positive effects that: