US 11,788,969 B2 · Methods and apparatus for determination of halohydrocarbons

Abstract

A real-time, on-line method and analytical system for determining halohydrocarbons in water which operate by (1) extracting on-line samples; (2) purging volatile halohydrocarbons from the water (e.g., with air or nitrogen); (3) carrying the purge gas containing the analytes of interest over a porous surface where the analytes are adsorbed; (4) recovering the analytes from the porous surface with heat (thermal desorption) or solvent (solvent elution) to drive the analytes into an organic chemical mixture; (5) generating an optical change (e.g., color change) in dependence upon a reaction involving the analytes and a pyridine derivative; and (6) measuring optical characteristics associated with the reaction to quantify the volatile halogenated hydrocarbon concentration.

Claims23

Dependent claims

An apparatus to monitor halohydrocarbon presence in a water distribution system, the apparatus comprising:

circuitry to communicate with a network;
a sample extraction mechanism to from-time-to-time draw water samples from the water distribution system;
a reservoir for a standard;
a measurement system to obtain measurements of halohydrocarbon concentration in respective ones of the water samples;
an electronic control system to
control the sample extraction mechanism and the measurement system so as obtain the measurements,
control the apparatus so as to from-time-to-time perform calibrations using the standard, and
renew the measurement system for ensuing ones of the measurements;
wherein the electronic control system is to control the apparatus to obtain the measurements according to timing that is externally dictated via the network.

6 more elements

An apparatus to monitor halohydrocarbon presence in a water distribution system, the apparatus comprising:

circuitry to communicate with a network;
a sample extraction mechanism to from-time-to-time draw water samples from the water distribution system;
a first reservoir for a standard and a second reservoir for a reagent;
a measurement system to obtain measurements of halohydrocarbon concentration in respective ones of the water samples, wherein the measurement system is to measure halohydrocarbon concentration by creating a reaction between halohydrocarbons separated from the samples and the reagent and by measuring an optical property of the reaction;
an electronic control system to
control the sample extraction mechanism and the measurement system so as obtain the measurements,
control the apparatus so as to from-time-to-time perform calibrations using the standard, and
renew the measurement system for ensuing ones of the measurements;
wherein the electronic control system is to control the apparatus so as to obtain the measurements according to timing that is externally dictated via the network.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/073,848Filed 19 Oct 2020 · continuation

Priority

22 Apr 2010

Published

US 2021/0172878 A110 Jun 2021

Granted

17 Oct 2023

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

G01N 21/78
By observing the effect on a chemical indicator: producing a change of colour
G01N 33/1826
Water: organic contamination in water
G01N 21/75
Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light: systems…
G01N 33/18
Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00: water

Family

Application61/326,717Us provisional application · filed 22 Apr 2010

PCT/US2011/032438Parent of this continuation · filed 14 Apr 2011

Application14/819,454Parent of this continuation · filed 6 Aug 2015

US 9,134,290 B2Parent of this continuation · filed 15 Sep 2015

Application16/004,189Parent of this continuation · filed 8 Jun 2018

US 10,018,567 B2Parent of this continuation · filed 10 Jul 2018

US 2021/0172878 A1Pre-grant publication · published 10 Jun 2021

US 10,845,313 B2Parent of this continuation

Application13/640,312Parent of this continuation

US 2013/0029427 A1Published application

US 2016/0123889 A1Published application

US 2019/0079020 A1Published application

US 11,788,969 B2This patent

From the US filing history. Foreign family members aren’t listed.

Methods and apparatus for determination of halohydrocarbons

Life of this patent

Methods and apparatus for determination of halohydrocarbons

Life of this patent

Abstract

Claims23