GB834633A - Apparatus for visually indicating or recording numerical values of constituents of fluids under analysis - Google Patents

Apparatus for visually indicating or recording numerical values of constituents of fluids under analysis

Info

Publication number
GB834633A
GB834633A GB16313/58A GB1631358A GB834633A GB 834633 A GB834633 A GB 834633A GB 16313/58 A GB16313/58 A GB 16313/58A GB 1631358 A GB1631358 A GB 1631358A GB 834633 A GB834633 A GB 834633A
Authority
GB
United Kingdom
Prior art keywords
potentiometer
voltage
tap
cell
concentration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB16313/58A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technicon International Ltd
Original Assignee
Technicon International Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Technicon International Ltd filed Critical Technicon International Ltd
Publication of GB834633A publication Critical patent/GB834633A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
GB16313/58A 1957-06-07 1958-05-21 Apparatus for visually indicating or recording numerical values of constituents of fluids under analysis Expired GB834633A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US834633XA 1957-06-07 1957-06-07

Publications (1)

Publication Number Publication Date
GB834633A true GB834633A (en) 1960-05-11

Family

ID=22178512

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16313/58A Expired GB834633A (en) 1957-06-07 1958-05-21 Apparatus for visually indicating or recording numerical values of constituents of fluids under analysis

Country Status (4)

Country Link
BE (1) BE568223A (enExample)
DE (1) DE1271428B (enExample)
FR (1) FR1208241A (enExample)
GB (1) GB834633A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3241432A (en) * 1962-01-23 1966-03-22 Technicon Instr Method and apparatus for sequentially performing analyses on a plurality of fluid samples

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1080481A (fr) * 1952-11-13 1954-12-09 Procédé et dispositifs applicables notamment aux spectrophotomètres

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3241432A (en) * 1962-01-23 1966-03-22 Technicon Instr Method and apparatus for sequentially performing analyses on a plurality of fluid samples

Also Published As

Publication number Publication date
FR1208241A (fr) 1960-02-22
BE568223A (enExample)
DE1271428B (de) 1968-06-27

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SU155568A1 (ru) ИЗМЕРИТЕЛЬНАЯ СЦИНТИЛЛЯЦИОННАЯ ГОЛОВКАЗа влено 3 декабр '1961 г. за ЛЬ 754088/26-10в Комитет по делам изобретений п открытий при Совете Министров СССР Опубликовано в «Бюллетене изобретеннй и товарных знаков» Лг 13 за 1963 г.Дозиметрический надзор и ко.нт^роль сточных вол, содержащих радиоактивные вещества, спускаемых промышленными предпри ти ми и учреждени ми, имеют больщое значение дл соблюдени допустимых значений, установленных за^коном. Трудности измерени таких загр знений состо т, с одной стороны, ;в весьмз низких уровн х активност)!, которые приходитс обччаруживать вблизи допустимого предела, и, с другой стороны, в том, что одновременно :предъ вл ютс требовани непрерывности измерений. ^Кроме того, отсчет измеренных величин должен производитьс без задерж^ки 'ПО времени, с тем чтобы можно было пр'И необходимости своевременно прекратить сток воды. Поэтому к наиболее существенны.м требован'и м, lHpeдъ Бл eмы^[ к подобньгм сбна- ружител .м излучени , относитс эффективность обнаружени , прежде всего дл бета- и га!мма-излучений, а та^кже оптимальны]'! геометрический показатель.Дл контрол радиоактивности воды ;!ли других сточных жидкостей берутс за основу концентрации, допустимые согласно международным саглащени м. Дл с-месей изотопов установлена максимально донуст;;- ма концентраци 10^' микрокюри на миллилитр. Непосредственное измерение столь малой радиоактивности возможно лишь при наличи!! сложной аппаратуры.БольЩ'Инство известных методов измерениГ! требует обогащени активного вещества, чаще всего посредством выпаривани . Л\етод обогащени делает весьма затруднительным создание аппаратуры дл производства непрерывных измерений. Среди методов обогащени главным образом известны: перегонка, ^процессы ионного обмена и метод осаждени или адсорбции.Недостатком применепи перегонки дл копцеитрировапи радио-