Aluminum Rubidium Sulfate

Abstract An improved alkali-flame detector using pure rubidium sulfate and an anode of new design were optimized for the quantitative determination of organophosphate pesticides. The performance of this detection system was evaluated for response to organophosphate standards, noise level, fluctuation of baseline, short- and long-term reproducibility at low pesticides levels, conditioning time of instrument, life and physical stability of alkali source, and required frequency of detector cleaning. Under optimum conditions the detector was sensitive to 1 pg pesticide standard. To define the parameters of the alkali flame detector, studies were made of different designs of the alkali source which influence flame configuration and the relationship of the position and shape of the anode to the flame. The most important parameter appears to be the method of introducing alkali vapor.

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Solubility diagram of (lithium sulfate + sodium sulfate + rubidium sulfate)(aq) at the temperature 298.15 K

The Journal of Chemical Thermodynamics ◽

10.1006/jcht.1994.1024 ◽

1994 ◽

Vol 26 (1) ◽

pp. 91-100 ◽

Cited By ~ 1

Author(s):

A.M. Kalinkin ◽

S.K. Vasin ◽

O.V. Antropova

Keyword(s):

Sodium Sulfate ◽

Solubility Diagram ◽

Lithium Sulfate ◽

Rubidium Sulfate

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Thermal and optical properties of Cu(II)-doped magnesium rubidium sulfate hexahydrate crystals

Journal of Thermal Analysis and Calorimetry ◽

10.1007/s10973-011-1315-1 ◽

2011 ◽

Vol 104 (3) ◽

pp. 963-967 ◽

Cited By ~ 12

Author(s):

H. Anandalakshmi ◽

S. Parthiban ◽

V. Parvathi ◽

V. Thanikachalam ◽

S. C. Mojumdar

Keyword(s):

Optical Properties ◽

Rubidium Sulfate

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Rubidium Sulfate Flame Detector: Modification of Flame Ionization Detectors, Parameter Characteristics, and Regions of Response of the Flame for Phosphorus Compounds

Journal of AOAC INTERNATIONAL ◽

10.1093/jaoac/53.6.1129 ◽

1970 ◽

Vol 53 (6) ◽

pp. 1129-1136

Author(s):

Hiroko K Deloach ◽

Delbert D Hemphill

Keyword(s):

Phosphorus Compounds ◽

Response Level ◽

Detection Systems ◽

Flame Ionization ◽

Platinum Anode ◽

Response Profile ◽

Flame Detector ◽

Rubidium Sulfate ◽

Ionization Detectors ◽

Made In

Abstract To obtain a reliable alkali-flame detector with a rubidium sulfate source, commercial detection systems were modified. Improvements were made in Barber-Colman Model 5121 FID and Varian Aerograph Model 1200 FID systems to decrease operational difficulties and detection inadequacies. Equipped with a rubidium sulfate alkali source and an adjustable platinum anode, the modified Barber- Colman FID was used to study the phosphorus response of various regions in the flame. Flame configuration, affected by flow rates of gases, influences not only the absolute response level but also the response profile as a function of the anode height. Consequently, the region of maximum response was altered markedly by the flame configuration. The region of the flame with maximum ion population is located within the area immediately surrounding the outside of the flame rather than in the flame.

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