Abstract: A sample introduction system providing variable online dilution of a sample is described. In one or more implementations, a device includes a spectrometry analysis system that employs example techniques in accordance with the present disclosure includes an inline dilution environment, including a first valve assembly configured to prepare a sample by accepting at least one of the sample, a diluent, a carrier, or an internal standard, where the first valve assembly includes a first sample loop; and a second valve assembly configured to prepare the sample by accepting the sample from the first valve assembly, where the second valve assembly is coupled to the first valve assembly, and where the second valve assembly includes a second sample loop.

Abstract: A sample identification system for an automated sampling and dispensing device is described. In an example implementation, the sample identification system includes a sample probe configured to contact a sample positioned within a sample vessel. Further, the sample identification system includes an identifier capture device configured to measure a sample identifier associated with the sample vessel and generate a data signal in response thereto, where the data signal corresponds to an identity of the at least one sample. During operation, the identifier capture device scans a sample holder, a sample vessel, or a table top of the automated sampling and dispensing device to measure the sample identifier and to generate the data signal in response thereto.

Abstract: A rotor, a valve assembly, and a method for using the rotor and valve assembly are described that provide a reversed flow path. In an implementation, a rotor that employs example techniques in accordance with the present disclosure includes a plurality of channels formed in a surface of the rotor, the surface configured to be adjacent to and interface with a stator having a plurality of ports, where at least one channel fluidically connects at least three of the plurality of ports.

Abstract: A connector is described that comprises a connector body with a connector end extending longitudinally from the connector body. The connector end comprises a generally cylindrical outer surface and a generally cylindrical inner surface. The generally cylindrical outer surface has a protrusion (e.g., a bulbous protrusion) providing a thickened cross-sectional area in the region of the connector end proximate to the protrusion so that the connector end can be connected to a second connector by inserting the second connector into the connector end. The second connector can also comprise a bulbous protrusion, and may be a nebulizer. A tube can be connected to the connector body (e.g., using a threaded connector).

Abstract: A method includes supplying a reagent to a column, where the column is configured to purify an element from a sample matrix for isotopic analysis. The method also includes loading the column with the sample matrix, and supplying a second reagent to collect the element retained by the column. The method further includes loading the column with a second sample mixture, and collecting an element from the second sample mixture retained by the column. A column configured to separate an element from a sample matrix for isotopic analysis includes a resin configured to retain the element. The column also includes a first frit disposed of a first end of the column and a second frit disposed of a second end of the column. The column is configured to receive a first reagent in a first flow direction and a second reagent in a second flow direction different from the first flow direction.

Abstract: A system includes a sample selector device, a chromatographic column selectively connectable to the sample selector device, and a spectrometry analysis device selectively connectable to the sample selector device. The sample selector device is configured to supply multiple individual samples to the chromatographic column to separate components of the individual samples. The sample selector device is also configured to store the separated components of the individual samples. The sample selector device is further configured to supply the separated components of the individual samples to the spectrometry analysis device. In embodiments of the disclosure, the components of the individual samples can be chromatographically separated while the spectrometry analysis device is offline.

Abstract: A system for determining an analyte by inductively coupled plasma mass spectrometry (ICPMS) includes a sample introduction device having a heated cyclonic spray chamber. The system is configured to introduce sample that includes a metal and/or a metalloid having an organic interferent. The system also includes an inductively coupled plasma mass spectrometry device with a collision/reaction cell configured to receive a mixture of gases including both ammonia and hydrogen. A method includes introducing a sample to plasma to produce a characteristic spectrum associated with an elemental composition of the sample. The method also includes introducing both ammonia and hydrogen to a collision/reaction cell to remove carbon-based interferences to detection of the sample prior to determining the elemental composition of the sample.

Abstract: A method for detecting material in a sample using an ICP instrument includes preparing the sample for analysis by the ICP instrument using hydrogen gas. For example, hydrogen gas can be generated by initiating a hydride generation reaction with the sample. Further, hydrogen gas can be introduced to a component part of the sample. For instance, hydrogen gas can be added to an injector gas in a spray chamber of the ICP instrument.

Abstract: A peristaltic pump includes a rotating member operably coupled to a drive. The rotating member includes a plurality of rollers arranged in a circular configuration. A guide member defines a channel configured to direct a peristaltic tube around the rotating member so that the peristaltic tube interfaces with the plurality of rollers. The peristaltic tube is pressed against the plurality of rollers by a retaining shoe. The retaining shoe contains surface irregularities configured to restrict movement of the peristaltic tube. A keeper braces the restraining shoe against the peristaltic tube. The rotating rollers compressing the peristaltic tube against the retaining shoe as the rotating member rotates results in a peristaltic action that produces a nearly pulse free linear flow.

Abstract: A sample introduction system provides mixing of a sample and a diluent within the container via gas injection. In one or more implementations, the sample introduction system causes a probe of an autosampler to be inserted into a container containing a sample and a diluent so that an end of the probe is submerged beneath a surface of the diluent and the sample. Gas is then injected through the probe to mix the sample and the diluent within the container. An aliquot of the mixed sample and diluent is then withdrawn through the probe.

Abstract: A sample identification system for an automated sampling and dispensing device is described. In an example implementation, the sample identification system includes a sample probe configured to contact a sample positioned within a sample vessel. Further, the sample identification system includes an identifier capture device configured to measure a sample identifier associated with the sample vessel and generate a data signal in response thereto, where the data signal corresponds to an identity of the at least one sample. During operation, the identifier capture device scans a sample holder, a sample vessel, or a table top of the automated sampling and dispensing device to measure the sample identifier and to generate the data signal in response thereto.

Abstract: Valve assemblies are described that provide segmented shuttle of liquid into sample vessels and automatic mixing via bubbles in the segmented liquid. A valve assembly includes a first valve member having ports configured to receive a pressurized gas, a first fluid, and a second fluid. The valve assembly also includes a second valve member coupled adjacent to the first valve member. The second valve member comprises a plurality of channels configured to interface with the first valve member. In a first configuration, the first fluid is loaded into an external loop. In the second configuration, the second fluid is eluted from the column into a vial in a segmented stream via bubbles of pressurized gas. Bubbles of gas automatically mix the eluted sample fluid.

Abstract: The present disclosure is directed to a system and a method for hydride generation. In some embodiments, the system includes an assembly for introducing hydride generation reagents into a mixing path or mixing container, where the assembly includes first chamber configured to contain a first hydride generation reagent and a second chamber configured to contain a second hydride generation reagent. A first plunger is configured to translate within the first chamber and cause a displacement of the first hydride generation reagent, and a second plunger is configured to translate within the second chamber and cause a displacement of the second hydride generation reagent. The assembly further includes base coupling the first plunger and the second plunger together.

Abstract: A system can include a sampler assembly configured to collect a viscous sample at a first location. In implementations, the viscous sample includes concentrated sulfuric acid (e.g., greater than about 75% H2SO4). The system can also include a valve coupled with the sampler assembly for receiving the viscous sample. The valve is configured to couple with a source of a diluent and a sample transfer line. The system further includes a pump coupled with the valve for injecting the diluent into the sample transfer line along with the viscous sample to dilute the viscous sample and transport the diluted sample to a second location remote from the first location via the sample transfer line. In implementations, the sample transfer line is at least approximately two meters in length.

Abstract: In one or more implementations, an inductively coupled plasma torch cooling device that employs example techniques in accordance with the present disclosure includes an annular chamber configured to allow a flow of coolant to pass through the annular chamber, an inlet port, and an outlet port.

Abstract: A system can include a valve assembly including a first valve and a second valve in fluid communication with the first valve. The valve assembly can be configured to deliver one or more of a sample, a chemical (e.g., an acid, a base, an organic chemical, etc.), and a standard via flow of a working fluid facilitated by one or more syringe pumps. Further, the one or more of the sample, the chemical, and the standard can maintain a physical separation from the one or more syringe pumps during delivery of the one or more of the sample, the chemical, and the standard.

Abstract: A method for diluting a sample includes drawing an aliquot of the sample past a mixing junction. The method also includes supplying the sample to the mixing junction and supplying a second fluid to the mixing junction. The second fluid mixes with the sample at the mixing junction to generate a diluted sample. The method further includes supplying the diluted sample from the mixing junction.

Abstract: A system includes a first aerosolization device (e.g., a nebulizer and a spray chamber/desolvation device in fluid communication with the nebulizer) configured to furnish a first aerosol, and a second aerosolization device (e.g., a second nebulizer and a second spray chamber/desolvation device in fluid communication with the second nebulizer) configured to furnish a second aerosol. The first aerosolization device is balanced with the second aerosolization device. The system also includes an output coupled with the first aerosolization device and the second aerosolization device. The output is configured to supply at least one of the first aerosol or the second aerosol (e.g., to a torch). The system further includes a selection device coupling the first aerosolization device and the second aerosolization device to the output. The selection device is configured to selectively provide at least one of the first aerosol or the second aerosol to the output.

Abstract: A rotor, a valve assembly, and a method for using the rotor and valve assembly are described that provide a reversed flow path. In an implementation, a rotor that employs example techniques in accordance with the present disclosure includes a plurality of channels formed in a surface of the rotor, the surface configured to be adjacent to and interface with a stator having a plurality of ports, where at least one channel fluidically connects at least three of the plurality of ports.

Abstract: A sample identification system for an automated sampling and dispensing device is described. In an example implementation, the sample identification system includes a sample probe configured to contact a sample positioned within a sample vessel. Further, the sample identification system includes an identifier capture device configured to measure a sample identifier associated with the sample vessel and generate a data signal in response thereto, where the data signal corresponds to an identity of the at least one sample. During operation, the identifier capture device scans a sample holder, a sample vessel, or a table top of the automated sampling and dispensing device to measure the sample identifier and to generate the data signal in response thereto.