# US 2021/0275947 A1 · Solid Phase Extraction Disk and Manufacturing Method

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- Number: US 2021/0275947 A1
- Document ID: US20210275947A1
- Status: Published application
- Kind: A1
- Application number: 17/192,932
- Filed: 2021-03-05
- Published: 2021-09-09
- Earliest claimed: 2020-03-07
- Inventors: Kevin Charles Dinnean
- Web page: https://patentgrep.com/patent/US20210275947A1

## CPC

- B01D 39/2017: {the material being filamentary or fibrous}
- B01D 29/01: with flat filtering elements (B01D29/39 takes precedence)
- B01D 29/03: self-supporting
- B01D 39/086: {of inorganic material}
- B01D 39/2024: {otherwise bonded, e.g. by resins}
- B01J 20/288: Polar phases
- B01J 39/26: Cation exchangers for chromatographic processes
- B01J 41/20: Anion exchangers for chromatographic processes
- G01N 1/405: {by adsorption or absorption}
- G01N 1/4077: {by other techniques involving separation of suspended solids}
- B01D 2239/0407: comprising particulate additives, e.g. adsorbents
- B01D 2239/065: More than one layer present in the filtering material
- B01D 2239/10: Filtering material manufacturing
- G01N 2001/4088: {filtration}
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)

## Abstract

Solid phase extraction (SPE) disks are manufactured by introducing a series of components and/or liquid suspensions into a mold and evacuating the liquid to form a cohesive filter or SPE disk. After all the free liquid has been substantially removed, the SPE disk is removed from the mold and dried. SPE disks are for use in analytical chemistry procedures.

## Claims

### Claim 1

A solid phase extraction disk comprising:
a. a top circular surface consisting of a cylindrical layer of wet-laid glass fiber; and
b. a middle cylindrical layer underlying the top glass fiber layer containing wet-laid glass fiber and one or more sorbents; and
c. a glass fiber mesh or filter paper underlying the glass fiber and sorbent layer creating a bottom circular surface; the three components forming a cohesive unit.

### Claim 2

A solid phase extraction disk comprising:
a. a top circular surface consisting of a cylindrical layer of wet-laid glass fiber; and
b. a middle cylindrical layer underlying the top glass fiber layer containing wet-laid glass fiber and one or more sorbents; and
c. a cylindrical layer of wet-laid glass fiber underlying the glass fiber and sorbent layer; and
d. a glass fiber mesh or filter paper underlying the second glass fiber layer creating a bottom circular surface; the four components forming a cohesive unit.

### Claim 3

A solid phase extraction disk comprising:
a. a top circular surface consisting of a cylindrical layer of wet-laid glass fiber; and
b. a middle cylindrical layer underlying the top glass fiber layer containing wet-laid glass fiber and one or more sorbents; and
c. a cylindrical layer of wet-laid glass fiber underlying the glass fiber and sorbent layer creating a bottom circular surface; the three components forming a cohesive unit.

### Claim 4 (depends on 1)

The disk of claim 1 where the edge of the top circular surface and cylindrical side is compressed during manufacture.

### Claim 5 (depends on 2)

The disk of claim 2 where the edge of the top circular surface and cylindrical side is compressed during manufacture.

### Claim 6 (depends on 3)

The disk of claim 3 where the edge of the top circular surface and cylindrical side is compressed during manufacture.