37 results about "Microbiological sampling" patented technology

A container assembly such as a petri dish or a contact plate for use as a sampling device for microorganisms includes a base member, a lid and a locking mechanism that provides a secure locking engagement between the lid and the base member. The locking mechanism is designed such that does not lock except upon application of a specific intentionally applied compressive force, and which may be readily disengaged from locking engagement without the need for a rotational movement or torsional force.

The invention discloses a preparation method of a composite membrane used for sampling and detecting microorganisms in the air. Place the supporting porous membrane on a horizontal glass plate, adjust the height of the membrane-making knife, and move the knife holder at a speed of 5-6 cm per minute, so that the membrane-making liquid is evenly distributed on the surface of the porous membrane to form a composite membrane skin layer, and the reaction temperature is 20 ~30℃, humidity 20~50%, pressure is negative pressure below atmospheric pressure, then heat treatment at 40~80℃ for 1~3 hours, and at the same time, composite membranes with different pore sizes can be prepared by adjusting the concentration of chitosan membrane-making liquid . The macromolecular substances in the composite membrane can maintain the activity of the entrapped microorganisms to a certain extent. Compared with other filter membranes, the composite membrane can reduce the formation of filter cake, and the flux is significantly increased compared with other filter membranes with the same pore size under the same test conditions. At the same time, the macromolecule coating solution used has biological activity, which can help microorganisms to maintain activity to a certain extent, so that the sample can reflect the air condition more realistically, and it also improves the problem of microbial activity maintenance during microbial sampling and reduces detection errors.

A sampling method using a sampling device (2) comprising a container (5) comprising a body (6) consisting of a soft pouch, and a lid (30), in which at least one among the container (5) and the lid (30) is provided with a discharging member (40) suitable for, in an open state, discharging at least one part of the gases contained in the internal space (7) of the body (6) of the container (5), wherein the sampling method comprises the steps consisting in: - collecting a biological material in the body (6) of the container (5), and assembling the lid (30) on the neck (10) of the container (5), - and placing an internal space (7) of the body (6) of the container (5) under anaerobic conditions by placing the discharging member (40) in the open state, by compressing the body (6) of the container(5) and by placing the discharging member (40) in a closed state.

A container assembly such as a petri dish or a contact plate for use as a sampling device for microorganisms includes a base member, a lid and a locking mechanism that provides a secure locking engagement between the lid and the base member. The locking mechanism is designed such that does not lock except upon application of a specific intentionally applied compressive force, and which may be readily disengaged from locking engagement without the need for a rotational movement or torsional force.

The present invention relates to a sterile sampling valve used on production pipelines or tanks for fizzy drinks, such as beer, cola, fruit milk, etc in order to solve the technical problems existing in the prior art that the sterilization and the oxygen isolation of valve cavities can not be ensured as the sampling valves used food industry are always exposed in the air, the cleaning operation is complicated, etc. The sampling valve comprises a sampling valve body and a sampling valve jacket. The sampling valve body is movably sheathed in the valve jacket. The valve jacket is divided into anupper cavity and a lower cavity by the valve body, wherein the lower cavity is sealed, and the upper cavity is open. As the sampling valve body is arranged in the valve jacket rather than directly exposed in the external environment, samples taken are effectively protected from pollution. Besides, the immersion of the sampling valve body in a sterilizing agent performs the double functions of sterilization and oxygen isolation. The sterilization operating steps for the valve body can be simplified during sampling, and the microbe sampling efficiency is improved. Even though the valve is not thoroughly cleaned after sampling, the sterile state of the valve body can still be well ensured.