公开(公告)号：US4590424A

公开(公告)日：1986-05-20

申请号：US535307

申请日：1983-09-23

Applicant: Pierre Girot ,  Egisto Boschetti

Inventor： Pierre Girot ,  Egisto Boschetti

IPC: G01N27/06 ,  G01N27/02 ,  G01N27/74

CPC classification number: G01N27/023

Abstract: A detector of ion concentration in a liquid is composed of a detection cell comprising a tubular piece formed from an electrically insulating material with a central passage which is fed with a liquid whose ion concentration is to be measured. A conducting coil is placed around the tubular piece, and is part of a first resonant circuit. A second reference resonant circuit is also provided, and signals of fixed frequency are applied in parallel to the two resonant circuits, and a comparator delivers a signal having a magnitude representative of the difference between the output signals from the two resonant circuits. Such a detector finds a use for example in liquid chromatography.

Abstract translation: 液体中的离子浓度检测器由检测单元构成，该检测单元由具有中间通道的电绝缘材料形成的管状件构成，该中间通道供给被测量离子浓度的液体。 导电线圈放置在管状件周围，并且是第一谐振电路的一部分。 还提供了第二参考谐振电路，并且固定频率的信号并联施加到两个谐振电路，并且比较器输出具有表示来自两个谐振电路的输出信号之间的差的幅度的信号。 这种检测器可用于例如液相色谱法。