Rapid Determination of Ortho- and Polyphosphates in Soft Drinks

1981 ◽  
Vol 44 (11) ◽  
pp. 835-838 ◽  
Author(s):  
YASUHIDE TONOGAI ◽  
MASAHIRO IWAIDA
Keyword(s):  
Rapid Determination ◽  
Soft Drink ◽  
Soft Drinks ◽  
Two Dimensional ◽  
Detection Level ◽  
Three Samples ◽  
Ion Exchange Column ◽  
Mango Juice ◽  
Layer Chromatography

Ortho-, poly (pyro- and higher)- and meta-phosphates can be separated from each other with two dimensional thin layer chromatography, the detection level being 1 μg as P2O5. For determination of ortho- and poly (including polymeta-)-phosphates, an ion-exchange column chromatography was used. A single concentration elution with 0.2 M potassium chloride was effective for separating of orthophosphates from polyphosphates, and the residual polyphosphates could be recovered with 6 N hydrochloric acid. This system was used for a survey of polyphosphates in 61 samples of soft drinks sold in Osaka. Results showed that the total phosphate contents within the range of 0 – 0.420 g of P2O5/kg. Only three samples contained polyphosphates. The highest being 0.261 g of polyphosphate/kg in a soft drink containing 20% mango juice.

Gas-Liquid Chromatographic Determination of Adipic Acid in Crackling Candy and Soft Drinks

1979 ◽  
Vol 62 (4) ◽  
pp. 937-938
Author(s):  
Yoshio Ito ◽  
Shunjiro Ogawa ◽  
Masahiro Iwaida
Keyword(s):  
Adipic Acid ◽  
Rapid Determination ◽  
Soft Drink ◽  
Water Layer ◽  
Chromatographic Determination ◽  
Soft Drinks ◽  
Flame Ionization ◽  
Interlaboratory Test ◽  
Liquid Chromatographic

Abstract A procedure was developed for the simple and rapid determination of adipic acid in crackling candy and also in soft drinks. An alkaline solution of sample was extracted with ethyl ether to remove fatty substances, and H2SO4 was added to water layer to adjust the pH to <2. The acidified layer was saturated with NaCl and then extracted with ether. After drying, the ether layer was concentrated and the adipic acid in the concentrate was methylated using the diazomethane method. An aliquot of the methylated solution was injected into a gas chromatograph equipped with a flame ionization detector. Recovery of adipic acid from crackling candy and from 2 kinds of soft drinks that had been fortified at the 200 ppm level was over 96 %. An interlaboratory test was carried out on the determination of adipic acid in orange soft drink. The results obtained by 6 laboratories were between 91 and 100% compared with the theoretical value.

Spectrophotometric Determination of Cyclamate in Soft Drinks and Desserts: Complementary Collaborative Study

1988 ◽  
Vol 71 (6) ◽  
pp. 1212-1214
Author(s):  
Anna-Maija K SJÖBERG
Keyword(s):  
Spectrophotometric Determination ◽  
Spectrophotometric Method ◽  
Soft Drink ◽  
Collaborative Study ◽  
Soft Drinks ◽  
Food Control ◽  
Average Recovery ◽  
Relative Standard ◽  
Standard Deviations

Abstract Fifteen official food control laboratories participated in a collaborative study of a spectrophotometric method to determine cyclamate in a soft drink and a dessert at concentrations of 90-311 mg/L and 202-526 mg/kg, respectively, with blind duplicates and a blank. Average recovery from the soft drink was 97.5%, and from the dessert, 98.6%. Reproducibility relative standard deviations were 4.7-6.5% and 6.9-8.5%, respectively. The outlier percentage was 5.5%. This study complements an earlier work by leading Nordic food laboratories and was designed according to the latest recommendations. The results of this study were compared with those of the earlier collaborative study and with general collaborative results obtained by AOAC.

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