公开(公告)号：US10692709B2

公开(公告)日：2020-06-23

申请号：US16173473

申请日：2018-10-29

Applicant: Waters Technologies Corporation

Inventor： Scott J. Geromanos ,  Marc V. Gorenstein ,  Daniel Golick ,  Steven J. Ciavarini

IPC: G01N30/86 ,  H01J49/00 ,  G01N27/62 ,  G01N30/72

Abstract: A method of analyzing a complex sample includes performing a sequential chromatographic-IMS-MS analysis of a sample to obtain a plurality of experimental mass spectra having isotopic clusters, wherein each spectrum of the plurality of spectra is associated with a chromatographic retention time and an ion-mobility drift time. The method also includes calculating a model isotopic cluster of a precursor or product ion associated with a candidate compound in the sample, in correspondence to the natural isotopic-abundance ratios of elements composing the compound. The method further includes comparing peaks of the model isotopic cluster to corresponding peaks of an isotopic cluster of one of the experimental mass spectra to extract one or more saturated or interfered peaks of the experimental isotopic cluster, wherein at least one of the peaks of the experimental isotopic cluster is un-saturated and un-interfered.

公开(公告)号：US10573501B2

公开(公告)日：2020-02-25

申请号：US15578148

申请日：2016-05-31

Applicant: WATERS TECHNOLOGIES CORPORATION

Inventor： Scott J. Geromanos ,  Steven J. Ciavarini ,  Curt Devlin

IPC: H01J49/00 ,  G01N30/72 ,  G01N30/86 ,  G01N33/68 ,  G06F19/00 ,  G16C20/70

Abstract: Techniques for performing data acquisition and analysis are described. A multi-mode acquisition strategy may be performed which iteratively selects mass isolation windows of different sizes in different scan cycles to acquire experimental data. The mass isolation windows selected may provide for acquiring elevated energy scan data for a defined set of m/z values. Single scan data analysis may be performed. Data analysis may include forming precursor charge clusters, chaining precursor charge clusters having the same mass to charge ratio to form peaks profiles, and using criteria to align precursor and product ions of the experimental data. Unsupervised and supervised clustering may be performed using a database and composite ion spectra formed from experimental data. Also described are a small molecule acquisition enhancement and additional techniques applicable for biopharmaceutical and other applications.

公开(公告)号：US20180231988A1

公开(公告)日：2018-08-16

申请号：US15953007

申请日：2018-04-13

Applicant: Waters Technologies Corporation

Inventor： Joshua A. Shreve ,  Paul Keenan ,  Steven J. Ciavarini

IPC: G05D7/06 ,  F17D3/00 ,  B01D15/16 ,  G05D16/20 ,  G01N30/32 ,  G01N30/86 ,  G01N30/88 ,  B01D15/40

CPC classification number: G05D7/0623 ,  B01D15/163 ,  B01D15/40 ,  F17D3/00 ,  G01N30/32 ,  G01N30/86 ,  G01N30/8658 ,  G01N30/8696 ,  G01N2030/324 ,  G01N2030/326 ,  G01N2030/328 ,  G01N2030/8804 ,  G05D16/2013 ,  G05D16/2066 ,  Y10T137/86397

Abstract: Exemplary embodiments of the present disclosure are directed to manipulating pressure-related hysteresis in a pressurized flow system by setting the pressure of the system to a predetermined location in the hysteresis band to advantageously minimize an effect of the pressure related hysteresis on the pressure of the system or to advantageously benefit from the effects of the hysteresis on the pressure of the system.

公开(公告)号：US20180144918A1

公开(公告)日：2018-05-24

申请号：US15819793

申请日：2017-11-21

Applicant: WATERS TECHNOLOGIES CORPORATION

Inventor： Scott J. Geromanos ,  Curt Devlin ,  Steven J. Ciavarini

IPC: H01J49/00

Abstract: Techniques and apparatus for analyzing mass spectrometry data are described. In one embodiment, for example, an apparatus may include logic to access a product ion data set generated via mass analyzing a sample comprising a target precursor, access precursor composition information for elements of the target precursor that includes nominal mass and mass defect information, determine nominal mass (NM)-mass defect (MD) relationship information for ion fragments associated with the target precursor based on the precursor composition information, determine one or more fragment upper boundaries and one or more fragment lower boundaries, extract candidate ion fragments from the ion fragments via applying the one or more fragment upper boundaries and the one or more fragment lower boundaries to the NM-MD relationship information, and determine target ion fragments from the plurality of candidate ion fragments based on fragmentation efficiency information associated with the candidate ion fragments. Other embodiments are described and claimed.

公开(公告)号：US09946268B2

公开(公告)日：2018-04-17

申请号：US14381978

申请日：2013-03-07

Applicant: Waters Technologies Corporation

Inventor： Joshua A. Shreve ,  Paul Keenan ,  Steven J. Ciavarini

IPC: G01N30/32 ,  G01N30/86 ,  G05D7/06 ,  B01D15/16 ,  F17D3/00 ,  G05D16/20 ,  B01D15/40 ,  G01N30/88

CPC classification number: G05D7/0623 ,  B01D15/163 ,  B01D15/40 ,  F17D3/00 ,  G01N30/32 ,  G01N30/86 ,  G01N30/8658 ,  G01N30/8696 ,  G01N2030/324 ,  G01N2030/326 ,  G01N2030/328 ,  G01N2030/8804 ,  G05D16/2013 ,  G05D16/2066 ,  Y10T137/86397

Abstract: Exemplary embodiments of the present disclosure are directed to manipulating pressure-related hysteresis in a pressurized flow system by setting the pressure of the system to a predetermined location in the hysteresis band to advantageously minimize an effect of the pressure related hysteresis on the pressure of the system or to advantageously benefit from the effects of the hysteresis on the pressure of the system.

公开(公告)号：US20150298027A1

公开(公告)日：2015-10-22

申请号：US14687290

申请日：2015-04-15

Applicant: Waters Technologies Corporation

Inventor： Michael R. Jackson ,  Christopher Seith ,  Steven J. Ciavarini ,  Kara O'Donnell ,  John Angelosanto ,  John Leason

IPC: B01D19/00 ,  B01D15/08

CPC classification number: B01D19/0073 ,  B01D15/08 ,  B01D15/16 ,  B01D19/0036 ,  B01D19/0063 ,  B01D19/0068 ,  G01N30/14 ,  G01N30/26 ,  G01N30/34

Abstract: Described is a method for vacuum degassing of a liquid such as a solvent for a liquid chromatography system. The method includes modulating application of a vacuum to a fluid channel of a degasser so that each volume of a liquid drawn from the degasser experiences a residence time that is equal to the residence times of the other volumes. The residence time is determined as a time that the volume resides in the fluid channel under application of the vacuum and to a magnitude of the applied vacuum. The method is advantageous for use with liquid chromatography systems where differences in the diffusion rates of solvents into the degasser vacuum can otherwise introduce error into the composition gradient of a mobile phase.

Abstract translation: 描述了液体如液相色谱系统的溶剂的真空脱气方法。 该方法包括调节对脱气机的流体通道施加真空，使得从脱气器抽出的每个体积的液体经历等于其它体积的停留时间的停留时间。 停留时间被确定为在施加真空时体积位于流体通道中的时间以及施加的真空度的大小。 该方法有利于与液相色谱系统一起使用，其中溶剂进入脱气机真空的扩散速率差异可能会将误差引入流动相的组成梯度。

公开(公告)号：US20150043303A1

公开(公告)日：2015-02-12

申请号：US14521514

申请日：2014-10-23

Applicant: Waters Technologies Corporation

Inventor： Joshua A. Shreve ,  Steven J. Ciavarini

IPC: B01F15/04 ,  B01D15/14

CPC classification number: B01F15/0479 ,  B01D15/14 ,  B01F15/0216 ,  G01N30/34 ,  G01N30/36 ,  G01N35/00871 ,  G01N35/1097 ,  G01N2030/347 ,  G01N2035/00544 ,  G05D11/133

Abstract: Described is a method of reducing liquid composition errors in a low-pressure mixing pump system. Packets representing the switching intervals of each component of the desired fluid mixture are provided to an intake of the mixing pump system. For each packet, a switching time associated with at least one of the components in the packet is modulated. Modulated switching times are based on time offsets that are specifically selected according to the undesirable frequency characteristic of an intake response of the mixing pump system. The average of the volumes contributed by the packets thus modulated is equal to a component volume that achieves a desired proportion of the component in the output flow of the mixing pump system. Modulated switching times enable the reduction or elimination of composition error in the output flow of the mixing pump system.

Abstract translation: 描述了在低压混合泵系统中减少液体组成误差的方法。 表示所需流体混合物的每个组分的切换间隔的分组被提供给混合泵系统的进气口。 对于每个分组，调制与分组中的至少一个分量相关联的切换时间。 调制切换时间基于根据混合泵系统的进气响应的不期望的频率特性而特别选择的时间偏移。 由如此调制的分组贡献的卷的平均值等于在混合泵系统的输出流中实现组分的期望比例的分量体积。 调制切换时间可以减少或消除混合泵系统的输出流量中的组成误差。

公开(公告)号：US20150008862A1

公开(公告)日：2015-01-08

申请号：US14463149

申请日：2014-08-19

Applicant: Waters Technologies Corporation

Inventor： Joshua A. Shreve ,  Steven J. Ciavarini

IPC: H02P8/14

CPC classification number: H02P8/14 ,  F04B17/03 ,  F04B49/065 ,  F04B2203/0207 ,  F04B2203/0209 ,  G01N30/34 ,  G01N2030/326

Abstract: Systems and methods for operating a stepper motor of a pump at a desired low velocity include memory for storing information corresponding to an intake velocity profile. The intake velocity profile represents an optimized acceleration curve for operating the stepper motor over a range of motor velocities during an intake cycle. A processor of a system controller dynamically accesses the memory during the intake cycle to acquire the information representing the intake velocity profile and issues a series of pulses to the stepper motor based on this information. In response to the pulses, the stepper motor accelerates in accordance with the optimized acceleration curve represented by the intake velocity profile. The optimized acceleration curve is based on the available torque of the stepper motor across a range of motor velocities and enables the motor to operate with greater torque utilization and less margin than traditional linear acceleration profiles.

Abstract translation: 用于以期望的低速度操作泵的步进电动机的系统和方法包括用于存储对应于进气速度曲线的信息的存储器。 进气速度曲线表示在进气循环期间在一定范围的电机速度下操作步进电机的优化加速曲线。 系统控制器的处理器在进气循环期间动态地访问存储器以获取表示进气速度分布的信息，并基于该信息向步进电动机发出一系列脉冲。 响应于脉冲，步进电机根据由进气速度分布表示的优化加速度曲线加速。 优化的加速曲线基于步进电机在电机速度范围内的可用扭矩，并使电机能够以更大的转矩利用率和比传统线性加速度曲线更小的裕度运行。

公开(公告)号：US20140086003A1

公开(公告)日：2014-03-27

申请号：US14093836

申请日：2013-12-02

Applicant: Waters Technologies Corporation

Inventor： Joshua A. Shreve ,  Steven J. Ciavarini

IPC: B01F15/02

CPC classification number: B01F15/0479 ,  B01D15/14 ,  B01F15/0216 ,  G01N30/34 ,  G01N30/36 ,  G01N35/00871 ,  G01N35/1097 ,  G01N2030/347 ,  G01N2035/00544 ,  G05D11/133

Abstract: Described is a method of reducing liquid composition errors in a low-pressure mixing pump system. Packets representing the switching intervals of each component of the desired fluid mixture are provided to an intake of the mixing pump system. For each packet, a switching time associated with at least one of the components in the packet is modulated. Modulated switching times are based on time offsets that are specifically selected according to the undesirable frequency characteristic of an intake response of the mixing pump system. The average of the volumes contributed by the packets thus modulated is equal to a component volume that achieves a desired proportion of the component in the output flow of the mixing pump system. Modulated switching times enable the reduction or elimination of composition error in the output flow of the mixing pump system.

Abstract translation: 描述了在低压混合泵系统中减少液体组成误差的方法。 表示所需流体混合物的每个组分的切换间隔的分组被提供给混合泵系统的进气口。 对于每个分组，调制与分组中的至少一个分量相关联的切换时间。 调制切换时间基于根据混合泵系统的进气响应的不期望的频率特性而特别选择的时间偏移。 由如此调制的分组贡献的卷的平均值等于在混合泵系统的输出流中实现组分的期望比例的分量体积。 调制切换时间可以减少或消除混合泵系统的输出流量中的组成误差。