| 摘要 |
An assay device for measuring the concentration of a soluble analyte, such as HDL-associated cholesterol, in a fluid sample containing interfering compounds, such as LDL-or VLDL-associated cholesterol, which can be selectively precipitated. The device includes a sieving matrix capable of separating soluble and precipitated material migrating through the matrix, and a reservoir which holds a precipitating agent which is effective, within a given concentration range, to selectively precipitate the interfering compounds. The reservoir is designed to delay the release of agent, on contact with the fluid sample, to maintain the concentration of precipitating agent in contact with the fluid sample within the given concentration range.
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