Intelligent system and method for automated packing of chromatography columns
View Patent ↗The present invention provides an automated system and method for packing chromatography columns. In one embodiment, the system first determines the type of media that is present in the column, and uses this information to generate an automated procedure to pack the specific media type. In a second embodiment, the media type is made known to the system, such as via input from the operator. The system then uses this information, in the same manner as in the first embodiment, to generate an automated procedure to pack the specific media type. Finally, in a third embodiment, parameters such as column height and rate of compression are made known to the system, such as via input from the operator. The system then packs the column in accordance with these supplied parameters.
1. A method of packing a media bed of an unknown media slurry, wherein said unknown media is from a set of known media types, in a chromatography column having an adjuster adapted to compress said media and means for measuring the force on said adjuster, said method comprising:
actuating said adjuster to compress said media to a first column height;
measuring the force on said adjuster at said first column height;
calculating an index value based on said force measured at said first column height;
determining said unknown media type by comparing said index value to the index value of each of said known media types;
selecting packing parameters based on said determined media type; and
packing said column based on said selected packing parameters.
2. The method of claim 1 , further comprising:
actuating said adjuster to compress said media to a second column height;
measuring the force on said adjuster at said second column height; and
wherein said step of calculating an index value comprises computing an index value by comparing the difference between said force at said first column height and said force at said second column height to the difference between said first column height and said second column height.
3. The method of claim 1 , wherein said packing step comprises:
actuating said adjuster to compress said bed;
determining said force on said adjuster; and
ceasing movement of said adjuster when said force reaches a predetermined level.
4. The method of claim 1 , wherein said packing step comprises:
actuating said adjuster to compress said bed;
determining said force on said adjuster;
calculating the time derivative of said force; and
ceasing movement of said adjuster when said time derivative of said force reaches a predetermined level.
5. The method of claim 1 , wherein said force on said adjuster comprises a compression force from said media and a hydraulic force from a fluid flowing through said column, and said chromatography column comprises means for measuring the compression force on said adjuster, and said packing step comprises:
actuating said adjuster to compress said bed;
determining said compression force on said adjuster; and
ceasing movement of said adjuster when said compression force reaches a predetermined level.
6. The method of claim 1 , wherein said force on said adjuster comprises a compression force from said media and a hydraulic force from a fluid flowing through said column, and said chromatography column comprises means for measuring the compression force on said adjuster, and said packing step comprises:
actuating said adjuster to compress said bed;
determining said compression force on said adjuster;
calculating the time derivative of said compression force; and
ceasing movement of said adjuster when said time derivative of said compression force reaches a predetermined level.
7. The method of claim 1 , wherein said force on said adjuster comprises a compression force from said media and a hydraulic force from a fluid flowing through said column, and said chromatography column comprises means for measuring the compression force on said adjuster, and said packing step comprises:
actuating said adjuster to compress said bed;
determining said compression force and said force on said adjuster;
calculating the ratio of said compression force to said force; and
ceasing movement of said adjuster when said ratio reaches a predetermined level.
8. The method of claim 1 , wherein said force on said adjuster comprises a compression force from said media and a hydraulic force from a fluid flowing through said column, and said chromatography column comprises means for measuring the hydraulic force on said adjuster, and said packing step comprises:
actuating said adjuster to compress said bed;
determining said hydraulic force and said force on said adjuster;
calculating the ratio of said hydraulic force to said force; and
ceasing movement of said adjuster when said ratio reaches a predetermined level.
9. The method of claim 1 , wherein said force on said adjuster comprises a compression force from said media and a hydraulic force from a fluid flowing through said column, and said chromatography column comprises means for measuring the hydraulic force on said adjuster, and said packing step comprising the sequential steps of:
actuating said adjuster at such a velocity such that said hydraulic pressure reaches a predetermined level;
decreasing the velocity of said adjuster to maintain said hydraulic pressure at said predetermined level;
increasing the velocity of said adjuster to maintain said hydraulic pressure at said predetermined level; and
ceasing movement of said adjuster when its current velocity is greater than its velocity at the transition between said decreasing and increasing steps by a predetermined amount.
10. The method of claim 1 , wherein said chromatography column comprises means for determining the position of said adjuster within said column, and said packing step comprises:
actuating the adjuster at a predetermined velocity; and
ceasing movement of said adjuster when said adjuster reaches a predetermined position within said column.