Claims
- 1. In an indirect agglutination assay method in which agglutination is caused by an antigen-antibody reaction employing magnetic particles, said particles having an antigen or antibody bound thereto which bind to an analyte which may be in a sample, the particles being attracted to a point in a container containing both the sample and particles under the influence of an applied magnetic force, which is removed to allow the particles to flow under the influence of gravity to form a precipitation pattern, wherein the length of the pattern is measured and then evaluated to judge the occurrence of an immunoreaction based on the length of the precipitation pattern, the improvement which comprises measuring the lengths of said precipitation pattern at a plurality of points within said container, comparing said measured lengths whit each other, selecting the longest length of the measured lengths as the length for said precipitation pattern, and determining whether the immunoreaction is positive or negative by comparing said length with a known standard.
- 2. The assay of claim 1, wherein said container has a closed bottom which is horizontal with respect to a vertical peripheral surface thereof and said applied magnetic force is applied to a center of said bottom.
- 3. The assay of claim 1, wherein said container has a closed bottom which is inclined in a single direction with respect to a vertical peripheral surface thereof and said magnetic force is applied to a point along said inclined bottom.
Priority Claims (2)
Number |
Date |
Country |
Kind |
5-139076 |
May 1993 |
JPX |
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5-139082 |
May 1993 |
JPX |
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Parent Case Info
This is a continuation division of application Ser. No. 08/242,717 filed May 13, 1994 now abandoned.
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Name |
Date |
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4148607 |
Bernoco et al. |
Apr 1979 |
|
4373931 |
Takekawa |
Feb 1983 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
242717 |
May 1994 |
|