Polymer total dissolved solids vessel
First Claim
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1. A method for testing total dissolved solids in a liquid sample, the method comprising:
- placing a volume of liquid into a testing vessel, wherein the testing vessel comprises;
a main body comprising an open top end and a sealed bottom end to define an inner cavity configured to hold a volume of liquid, wherein the main body comprises a thin walled polymeric material having a melting temperature greater than 180°
C.; and
an indicia applied to a portion of the main body indicating a tare weight of the testing vessel, wherein the tare weight of the testing vessel comprises a weight of the testing vessel measured after at least one preconditioning step, wherein the at least one preconditioning step comprises heating the testing vessel to at least 180°
C. for a first length of time,heating the testing vessel containing the liquid sample for a time sufficient to evaporate the volume of liquid;
heating the testing vessel at 180°
C. for a second length of time and weighing the testing vessel; and
repeating the step of heating the testing vessel at 180°
C. for the second length of time and weighing the testing vessel until a subsequently recorded weight of the testing vessel varies by less than 0.5 mg from a previously recorded weight.
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Abstract
A thin film vessel useable in gravimetric methods for measuring the total dissolved solids or total solids in a liquid sample, or the moisture content of a solid sample. The vessel includes a main body formed of a thin walled polymeric material having a melting temperature greater than 180° C. The main body comprises an open top edge and a sealed bottom edge which define an inner cavity configured to hold a volume of liquid, and indicia applied to a portion of the main body, wherein the indicia include a tare weight of the vessel.
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Citations
14 Claims
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1. A method for testing total dissolved solids in a liquid sample, the method comprising:
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placing a volume of liquid into a testing vessel, wherein the testing vessel comprises; a main body comprising an open top end and a sealed bottom end to define an inner cavity configured to hold a volume of liquid, wherein the main body comprises a thin walled polymeric material having a melting temperature greater than 180°
C.; andan indicia applied to a portion of the main body indicating a tare weight of the testing vessel, wherein the tare weight of the testing vessel comprises a weight of the testing vessel measured after at least one preconditioning step, wherein the at least one preconditioning step comprises heating the testing vessel to at least 180°
C. for a first length of time,heating the testing vessel containing the liquid sample for a time sufficient to evaporate the volume of liquid; heating the testing vessel at 180°
C. for a second length of time and weighing the testing vessel; andrepeating the step of heating the testing vessel at 180°
C. for the second length of time and weighing the testing vessel until a subsequently recorded weight of the testing vessel varies by less than 0.5 mg from a previously recorded weight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 12)
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8. A method of producing a vessel useful for gravimetric testing, the method comprising:
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performing at least one preconditioning step on the vessel, wherein the at least one preconditioning step comprises heating the vessel to at least 180°
C. for a specified time and weighing the vessel to obtain a tare weight of the vessel, wherein the vessel comprises;a main body having an open top end and a sealed bottom end to define an inner cavity configured to hold a volume of liquid, wherein the main body comprises a thin walled polymeric material having a melting temperature greater than 180°
C.; andapplying an indicia to a portion of the main body of the vessel, wherein the indicia include the tare weight of the vessel. - View Dependent Claims (9, 10, 11)
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13. A method of producing a vessel useful for gravimetric testing, the method comprising:
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performing a preconditioning step on the vessel, wherein the preconditioning step comprises heating the vessel to at least 180°
C. for a specified time and weighing the vessel, wherein the vessel comprises;a main body having an open top end and a sealed bottom end to define an inner cavity configured to hold a volume of liquid, wherein the main body comprises a thin walled polymeric material having a melting temperature greater than 180°
C.;repeating the preconditioning step until a subsequently recorded weight of the vessel varies by less than 0.5 mg from a previously recorded weight, wherein the subsequently recorded weight of the vessel is a tare weight of the vessel; and applying an indicia to a portion of the main body of the vessel, wherein the indicia include the tare weight of the vessel. - View Dependent Claims (14)
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Specification