Published November 10, 1975 | Version v1
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Radiochemical investigations on the solubility of molybdatophosphate in phosphate determination

Creators

Description

The solubility of various molybdatophosphates was determined under the conditions of a gravimetric phosphate determination by radiochemical means by labelling PO43- with P-32. Starting with various conditions for phosphate determination via the molybdatophosphate of quinoline, 8-hydroxyquinoline, dimorpholino ethane, N,N,N',N'-tetrakis-β-hydroxypropyl ethylene diamine and N,N,N',N'-tetrakis-β-hydroxybutyl ethylene diamine, a general working rule was developed to determine the solubility. Taking the example of quinoline molybdatophosphates, a series of influencing factors - work, concentration and measuring parameters - were investigated in order to be able to limit the reliability region of the gravimetric phosphate determination. Depending on the conditions, the measured solubilities were between 10-10 and 10-6 Mol/l, the corresponding degrees of precipitation between 99.0 and 99.9999%. Apparent solubility products were calculated for the different molybdatophosphates using computer programmes especially developed for this purpose. (orig./RB)

Abstract (German)

Durch Markierung von PO43- mit P-32 wurde auf radiochemischem Weg die Loeslichkeit verschiedener Molybdatophosphate unter den Bedingungen einer gravimetrischen Phosphatbestimmung ermittelt. Ausgehend von verschiedenen Vorschriften zur Phosphatbestimmung ueber die Molybdatophosphate von Chinolin, 8-Hydroxychinolin, Dimorpholinoaethan, N,N,N',N'-Tetrakis-β-hydroxypropylaethylendiamin und N,N,N',N'-Tetrakis-β-hydroxybutylaethylendiamin wurde eine allgemeine Arbeitsvorschrift zur Loeslichkeitsbestimmung entwickelt. Am Beispiel des Chinolinmolybdatophosphats wurden eine Reihe von beeinflussenden Faktoren - Arbeits-, Konzentrations- und Messparameter - untersucht, um den Zuverlaessigkeitsbereich der gravimetrischen Phosphatbestimmung abgrenzen zu koennen. Die gemessenen Loeslichkeiten lagen, je nach Bedingung, zwischen 10-10 und 10-6 Mol/l, die entsprechenden Faellungsgrade zwischen 99,0 und 99,9999%. Fuer die verschiedenen Molybdatophosphate wurden scheinbare Loeslichkeitsprodukte mittels hierfuer entwickelter Computerprogramme berechnet. (orig./RB)

Additional details

Additional titles

Original title (German)
Radiochemische Untersuchungen ueber die Loeslichkeit von Molybdatophosphat bei der Phosphatbestimmung

Publishing Information

Imprint Pagination
178 p.

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
7267733
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Resource subtype / Literary indicator
Thesis, Non-conventional Literature
Descriptors DEI
ADDITIVES; AMMONIUM COMPOUNDS; IMPURITIES; MOLYBDATES; MOLYBDENUM PHOSPHATES; ORGANIC NITROGEN COMPOUNDS; PH VALUE; PHOSPHATES; PHOSPHORUS 32; PRECIPITATION; PROGRAMMING; QUANTITATIVE CHEMICAL ANALYSIS; RADIOCHEMISTRY; REAGENTS; RELIABILITY; SAMPLE PREPARATION; SOLUBILITY; TEMPERATURE DEPENDENCE; TRACER TECHNIQUES
Descriptors DEC
BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CHEMICAL ANALYSIS; CHEMISTRY; DAYS LIVING RADIOISOTOPES; ISOTOPE APPLICATIONS; ISOTOPES; LIGHT NUCLEI; MOLYBDENUM COMPOUNDS; NUCLEI; ODD-ODD NUCLEI; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PHOSPHORUS COMPOUNDS; PHOSPHORUS ISOTOPES; RADIOISOTOPES; SEPARATION PROCESSES; TRANSITION ELEMENT COMPOUNDS

Optional Information

Notes
30 figs.; 39 refs., with tabs. Available from ZAED.