Nathan J Saetveit, 442543 53Rd St, Omaha, NE 68104

2010025, Oct 7, 2010

Apr 7, 2009

12/384566

Nathan Saetveit - Omaha NE, US

G01N 1/28
G01N 31/22

436174, 2524081

A sample introduction solution includes nitric acid in an amount between approximately 1 percent and 10 percent by volume, hydrochloric acid in an amount between approximately 0.1 percent and 4 percent by volume, sulfuric acid in an amount between approximately 0.1 percent and 4 percent by volume, and hydrogen peroxide in an amount between approximately 0.1 percent and 8 percent by volume.

2020004, Feb 13, 2020

Aug 9, 2019

16/536893

- Omaha NE, US
Nathan Saetveit - Omaha NE, US

G01N 1/40

Systems and methods for automatic preconcentration of fluid samples using alternating dual holding loops are described. A system embodiment includes, but is not limited to, a first sample loop and a second sample loop alternately fluidically coupled with a sample source; a first valve to alternately introduce fluid from the sample source to the first sample loop and the second sample loop; a second valve to alternately receive fluid from the first sample loop and the second sample loop and to alternately provide access to the preconcentration column to fluid received from the first sample loop and the second sample loop; and a pump system configured to alternately introduce sample held in the first sample loop and sample held in the second sample loop to the preconcentration column via the first valve and the second valve.

2019007, Mar 7, 2019

Aug 31, 2018

16/119253

- Omaha NE, US
Austin Schultz - Omaha NE, US
Michael Paul Field - Papillion NE, US
Nathan Saetveit - Omaha NE, US

G01N 1/40
H01J 49/10
B01D 15/36
B01D 15/18
B01D 15/22
B01D 15/38

Systems and methods are described to concentrate a remote sample for analysis. A sample concentration system embodiment includes, but is not limited to, a plurality of valves including at least a first valve, a second valve, and a third valve; a plurality of columns including at least a first column and a second column, the first column fluidically coupled to the first valve, the second column fluidically coupled to the second valve; and a flow meter coupled with the third valve, the flow meter fluidically coupled with each of the first column and the second column when the plurality of valves is in a first flow path configuration to measure an amount of the liquid sample passed through the first column and the second column, wherein the plurality of valves includes a second flow path configuration and a third flow path configuration.