METHOD AND SUPPORT FOR STORING AND CONCENTRATING A NON-VOLATILE COMPOUND

• US 20160327460A1
• Filed: 11/07/2014
• Published: 11/10/2016
• Est. Priority Date: 11/08/2013
• Status: Abandoned Application

• Current Assignee: École Supérieure de Chimie Industrielles de la Ville de Paris
• Original Assignee: ESPCI Paris
• Inventors: TABELING, PATRICK, MONTI, FABRICE, MAGRO, LAURA
• Application Number:
  US15/034,524
• Publication Number:
  US 20160327460A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B01L 2200/0678 Facilitating or initiating evaporation
• CPC Class Codes: B01L 2300/069 Absorbents; Gels to retain a fluid
• CPC Class Codes: B01L 2400/0406 capillary forces
• CPC Class Codes: B01L 3/5023 with a sample being transported to, and subsequently stored in an absorbent for analysis
• CPC Class Codes: G01N 1/405 by adsorption or absorption

Abstract

A method for storing and concentrating at least one non-volatile compound contained in a fluid. The fluid additionally includes at least one volatile compound. The fluid is injected into a porous substrate for at least one volatile compound. At least one non-volatile compound, at least by capillarity, is transported by at least one volatile compound. Each transported non-volatile compound is concentrated by injecting at least one volatile compound into or onto the porous substrate to move at least one non-volatile compound from one point of the porous substrate to another. For each step of injecting a volatile compound, each non-volatile compound is dried at one point of the porous substrate by evaporating each volatile compound.

Claims

1-38. -38. (canceled)

39. A method for storing and concentrating at least one non-volatile compound contained in a fluid, the fluid additionally comprising at least one volatile compound, comprising the steps of:

injecting the fluid into a porous substrate for at least one volatile compound;

transporting at least one non-volatile compound, at least by capillarity, by said at least one volatile compound;

concentrating each transported non-volatile compound by;

injecting said at least one volatile compound into or onto the porous substrate to move said each transported non-volatile compound from one point of the porous substrate to another; and

for each step of injecting said at least one volatile compound, drying said each transported non-volatile compound at one point of the porous substrate by evaporating each volatile compound.

40. The method according to claim 39, further comprising, downstream from the concentration step, the step of reacting said at least one non-volatile compound with at least one reagent, each reagent being configured to react with each non-volatile compound

41. The method according to claim 39, wherein said at least one reagent is configured to modify, during the reaction step, transport properties of said at least one non-volatile compound.

42. Method according to claim 39, wherein at least one portion of the porous substrate comprises a different fibrous density than the rest of the porous substrate.

43. Method according to claim 42, wherein the porous substrate comprises a density gradient of fibers along an axis of the porous substrate.

44. Method according to claim 39, wherein the porous substrate comprises, over at least one portion of a surface of the porous substrate, a barrier configured to be non-porous for said at least one non-volatile compound, the porous substrate, including under the barrier, being configured to be porous for said at least one volatile compound.

45. A support for storing and concentrating at least one non-volatile compound contained in a fluid, the fluid additionally comprising at least one volatile compound, comprising:

a porous substrate;

a barrier over at least one portion of a surface of the porous substrate, the barrier being configured to be non-porous for said at least one non-volatile compound;

the porous substrate, including under the barrier, being porous for said at least one volatile compound, including under a barrier; and

said at least one non-volatile compound being concentrated by said at least one volatile compound flowing in the porous substrate.

46. The support according to claim 45, wherein the barrier is positioned at least partially in the porous substrate.

47. The support according to claim 45, wherein the barrier is an adhesive tape that is non-porous for said at least one non-volatile compound.

48. The support according to claim 45, wherein the barrier is a polymer or a resin solidified on the surface of the porous substrate.

49. The support according to claim 45, wherein the barrier is a wax melted and solidified on the surface of the porous substrate.

50. The support according to claim 45, wherein the barrier is obtained by a local contrast in a wetting property of the porous substrate.

51. The support according to claim 45, wherein the barrier forms a transport channel for each non-volatile compound.

52. The support according to claim 51, wherein the transport channel is configured such that each non-volatile compound is transported, at least by capillarity, by said at least one volatile compound along the transport channel;

and wherein the transport channel is configured such that said each non-volatile compound is concentrated in different points of the porous substrate by evaporation of each volatile compound.

53. The support according to claim 45, wherein the porous substrate comprises, in at least one point, a reagent configured to react with said at least one non-volatile compound.

54. The support according to claim 53, wherein the porous substrate comprises a plurality of reagents, at least two reagents not in contact with each other.

55. The support according to claim 45, wherein the barrier is configured to increase in thickness along an axis of the porous substrate to realize a transversal concentration of said each non-volatile compound in the porous substrate.

56. A device comprising the support according to claim 45;

and an injector to inject the fluid onto the porous substrate, the injector configured to perform a plurality of injections successively to concentrate at a same point of the porous substrate different quantities of a same non-volatile compound.

57. A device comprising the support according to claim 45;

and an injector to inject the fluid onto the porous substrate, the injector configured to perform a plurality of injections of different fluids, including at least one fluid that comprises said at least one non-volatile compound, onto the porous substrate to concentrate different non-volatile compounds at different points of the porous substrate, or to move said at least one non-volatile compound from one point of the porous substrate to another.