Flame Photometric Determination of Sodium and Potassium

1954 ◽  
Vol 26 (3) ◽  
pp. 598-599 ◽  
Author(s):  
S. B. Deal
Keyword(s):  
Photometric Determination ◽  
Sodium And Potassium

Determination of Sodium and Potassium in Fish and Other Marine Products

1964 ◽  
Vol 47 (4) ◽  
pp. 701-707
Author(s):  
Mary H Thompson
Keyword(s):  
Collaborative Study ◽  
Photometric Determination ◽  
Extraction Methods ◽  
Statistical Analyses ◽  
Relative Standard ◽  
Dry Ashing ◽  
Marine Products ◽  
Standard Deviations ◽  
Sodium And Potassium

Abstract Wet-ash and dry-ash extraction methods for the flame photometric determination of sodium and potassium in fish and other marine products were studied collaboratively. The wet-ash method was more accurate primarily because potassium was lost during the dry-ashing procedure at 550°C. Statistical analyses of precision indicate that wetashing is equal to or superior to dryashing. The Associate Referee, using the wet-ash procedure, obtained 98% recoveries for sodium and 102% for potassium, and relative standard deviations of 1.3—2.2 for sodium, and 1.5—3.6 for potassium. Over-all average recoveries obtained by the collaborators were 112% for sodium and 96% for potassium. Collaborative study will be continued.

Rapid Flame Photometric Determination of Sodium and Potassium in Silicate Rocks

1966 ◽  
Vol 20 (5) ◽  
pp. 302-304 ◽  
Author(s):  
K. Govindaraju
Keyword(s):  
Citric Acid ◽  
Good Accuracy ◽  
Matrix Effects ◽  
Photometric Determination ◽  
Fusion Product ◽  
Spectrographic Determination ◽  
Comparison Of Results ◽  
Sodium And Potassium ◽  
Silicate Rocks

A rapid and accurate flame photometric determination of sodium and potassium in silicate rocks is described. The sample is fused with a suitable fusion agent (H3BO3+Li2CO3) and the ground-fusion product is dissolved completely in dilute citric acid. The analysis of this solution for alkalies does not indicate any matrix effects. Comparison of results with available rock standards shows good accuracy and reproducibility. This method is used to supplement spectrographic determination of major constituents in silicate rocks, using borate fusion techniques and has been used for the analysis of more than 5000 rock samples.

Ion Exchange Resin Separation and Flame Photometric Determination of Sodium, Potassium, Magnesium, Calcium, and Strontium

1965 ◽  
Vol 48 (4) ◽  
pp. 719-722
Author(s):  
Eugene A Breault
Keyword(s):  
Exchange Resin ◽  
Photometric Determination ◽  
Ion Exchange Resin ◽  
Resin Column ◽  
Sodium Potassium ◽  
Resin Separation ◽  
Sodium And Potassium ◽  
Potassium Magnesium ◽  
Oxygen Flame

Abstract The cation exchange separation of metallic chlorides by hydrochloric acid on an Amberlite CG-120 resin (200-400 mesh) column was investigated. Commercially available resin was used in the experiments after the “fines” were removed by several water washings. A resin column (24 cm long by 12 mm diameter) gave excellent separation of sodium and potassium, with a total volume of 500 ml of 0.5N HCI at a flow rate of 0.55 ml/min. The recovery of each metal was 100%. Elution of the other three metals required 1100 ml of liV HCl; separation was very good but recoveries were poor. AH of the metals were determined with a Beckman DU with photomultiplier and hydrogen-oxygen flame attachment.

scholarly journals Extending the working range for the flame photometric determination of alkali metals and calcium using the PAVLIN spectrometer

2021 ◽  
Vol 25 (4) ◽  
pp. 326-330
Author(s):  
I.A. Zarubin ◽  
◽  
A.N. Putmakov ◽  
E.A. Lukina ◽  
D.O. Selunin ◽  
...  
Keyword(s):  
Alkali Metals ◽  
Analytical Signal ◽  
Photometric Determination ◽  
Spectral Lines ◽  
Lower Sensitivity ◽  
Entire Concentration Range ◽  
Minimum Concentration ◽  
Wide Range ◽  
Sodium And Potassium

At the Novosibirsk Chemical Concentrates Plant, the determination of alkali metals and calcium in the range of 0.1–100 mg/l is carried out using atomic emission spectra excited in an air-acetylene flame and recorded in the range of 390–860 nm. When these elements are analyzed simultaneously in a wide range of concentrations, the accumulation time of the analytical signal (exposure) is determined by the minimum concentration of calcium. However, at this exposure, the highly sensitive lines of sodium and potassium do not provide the analysis in the entire concentration range, since at large values, the analytical signal goes into saturation. Other analytical lines of potassium and sodium in the above-mentioned operating spectral range have three to four orders of magnitude lower sensitivity. As a result, there may be a gap in the range of detectable concentrations. This paper provides a way to eliminate this gap. To evaluate the degree of correction of the recorded signal, the relative intensities of the spectral lines of potassium and sodium excited in an air-acetylene flame are calculated. Then, based on the calculation results, an optimal echelette diffraction grating with a blaze angle of 300 nm is selected, and a combination of filters is installed to equalize the recorded radiation. As a result, for sodium and potassium, for which the determination is carried out along two analytical lines, the calibration dependences have an overlap that includes at least two concentration values.

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