To provide a preparative thin layer chromatography method capable of acquiring a target spot efficiently using a simple and convenient method without the possibility of decomposition of a component in a spot. The preparative thin layer chromatography method is a preparative method for dispensing a spot from a thin layer chromatography plate and includes a process 1 that forms a groove by removing the carrier at the circumferential edge of a spot to be dispensed, a process 2 that inserts a nozzle having a packing part at the tip thereof into the groove formed in the process 1, a process 3 that discharges a solvent through the nozzle, and a process 4 that sucks the solvent in which a spot component has been dissolved.

(EN) In the chromatographic chamber (3), to which the tip (11) enters from below. The tip (11) serves as the end of separate supply lines (5a, 5b, 5c . . . 5x), and each supply line (5a, 5b, 5c . . . 5x) is intended to deliver a separate eluent component. The first supply line (5a) comprises the first reservoir (6a) connected to the first pump (7a), to which the first flexible tube (8a) is connected terminated with the rigid tube (9a). The tip (11) is the first turning point (21) and then, with the use of the three-dimensional machine (2), it is passed along the line to the second turning point (22) and back again, while the individual components are pumped with variable efficiency controlled by the computer (20). This results in a quantitative and qualitative composition in time. At the same time, the position of the moving front is registered with the digital camera (19), and the signals of the eluent front migration distance are registered by the computer (20), and based on this information, the pumps (7a, 7b . . . 7x) that the individual components of the eluent are controlled accordingly. After reaching the final migration of the eluent front, the delivery of the components is stopped, and then the plate (18) is removed from the chromatographic chamber (3) and dried under the hood. As a result, the developed chromatogram is obtained. (19), and the signals of the eluent front migration distance are registered by the computer (20), and based on this information, the pumps (7a, 7b . . . 7x) that deliver individual components of the eluent are controlled accordingly. After reaching the final migration of the eluent front, the delivery of the components is stopped, and then the plate (18) is removed from the chromatographic chamber (3) and dried under the hood. As a result, the developed chromatogram is obtained. (19), and the signals of the eluent front migration distance are registered by the computer (20), and based on this information, the pumps (7a, 7b . . . 7x) that deliver individual components of the eluent are controlled accordingly. After reaching the final migration of the eluent front, the delivery of the components is stopped, and then the plate (18) is removed from the chromatographic chamber (3) and dr

A microtube comprises a sample receptor, a lid and a strip storage storing a chromatography strip. The chromatography strip is stored in a hollow part of the strip storage. The hollow part of the strip storage and an inner space of the sample receptor may be communicated in a closed condition under a state where the sample receptor and the lid are engaged.

A microtube comprises a sample receptor, a lid and a strip storage storing a chromatography strip. The chromatography strip is stored in a hollow part of the strip storage. The hollow part of the strip storage and an inner space of the sample receptor may be communicated in a closed condition under a state where the sample receptor and the lid are engaged.

The invention generally relates to ion generation using modified wetted porous materials. In certain aspects, the invention generally relates to systems and methods for ion generation using a wetted porous substrate that substantially prevents diffusion of sample into the substrate. In other aspects, the invention generally relate to ion generation using a wetted porous material and a drying agent. In other aspects, the invention generally relates to ion generation using a modified wetted porous substrate in which at least a portion of the porous substrate includes a material that modifies an interaction between a sample and the substrate.

The invention generally relates to ion generation using modified wetted porous materials. In certain aspects, the invention generally relates to systems and methods for ion generation using a wetted porous substrate that substantially prevents diffusion of sample into the substrate. In other aspects, the invention generally relate to ion generation using a wetted porous material and a drying agent. In other aspects, the invention generally relates to ion generation using a modified wetted porous substrate in which at least a portion of the porous substrate includes a material that modifies an interaction between a sample and the substrate.

A method for rapidly detecting pesticides based on thin-layer chromatography (TLC) and enzyme inhibition principles. The method includes the following steps: cutting a TLC plate into a rectangle, and using one end of the rectangle to contact a sample extract to form a pesticide residue separation area; covering the other end of the rectangle with a small piece cut from filter paper or glass fiber and fixing on a piece of enzyme inhibition reaction test paper to form a pesticide enrichment area; pasting a side of the enzyme inhibition reaction test paper away from the pesticide residue separation area with a piece of filter paper immobilized with a chromogenic agent to form a substrate color development area; and performing color reaction.

A method for rapidly detecting pesticides based on thin-layer chromatography (TLC) and enzyme inhibition principles. The method includes the following steps: cutting a TLC plate into a rectangle, and using one end of the rectangle to contact a sample extract to form a pesticide residue separation area; covering the other end of the rectangle with a small piece cut from filter paper or glass fiber and fixing on a piece of enzyme inhibition reaction test paper to form a pesticide enrichment area; pasting a side of the enzyme inhibition reaction test paper away from the pesticide residue separation area with a piece of filter paper immobilized with a chromogenic agent to form a substrate color development area; and performing color reaction.

A test device includes a housing and a lid. The housing encloses an internal space, has a hole supporting a container accommodating liquid, and includes a perforation/incision part. The lid covers a hole-formed part of the housing. The housing and/or the lid includes a guide that guides the housing and the lid, so that the lid can migrate from the first position to the second position while covering the hole-formed part of the housing. In the first position, the lid covers the hole-formed part of the housing and the container and the container is not incised. During the migration of the lid from the first position to the second position, the container is pushed toward the perforation/incision part by the lid, and the container is incised to leak liquid into the internal space.

A test device includes a housing and a lid. The housing encloses an internal space, has a hole supporting a container accommodating liquid, and includes a perforation/incision part. The lid covers a hole-formed part of the housing. The housing and/or the lid includes a guide that guides the housing and the lid, so that the lid can migrate from the first position to the second position while covering the hole-formed part of the housing. In the first position, the lid covers the hole-formed part of the housing and the container and the container is not incised. During the migration of the lid from the first position to the second position, the container is pushed toward the perforation/incision part by the lid, and the container is incised to leak liquid into the internal space.