2551
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2552
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Archer AW. Determination of benzoic and sorbic acids in orange juice by high-performance liquid chromatography. Analyst 1980; 105:407-9. [PMID: 7406212 DOI: 10.1039/an9800500407] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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2553
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Alozie TC, Rotimi CN, Oyibo BB. Production of aflatoxin by Aspergillus flavus (UBMI) in some Nigerian indigenous beverages and foodstuffs. Mycopathologia 1980; 70:125-8. [PMID: 6771654 DOI: 10.1007/bf00443079] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Sixteen samples of some Nigerian indigenous beverages and foodstuffs were analyzed for their aflatoxin content. All the eight samples of beverages tested were found to be contaminated with aflatoxin. Of the eight samples of foodstuffs tested, all contained aflatoxin except ewedu, dawadawa and shoko yokoto. All the beverages used as culture media for Aspergillus flavus (UBMI) supported the growth of the fungus and aflatoxin elaboration. A. flavus was found to grow luxuriantly on all samples of foodstuffs, except dawadawa. However, growth of the fungus on foodstuffs was not synonymous with aflatoxin production.
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2554
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Smoot JM, Nagy S. Effects of storage temperature and duration on total vitamin C content of canned single-strength grapefruit juice. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 1980; 28:417-421. [PMID: 7391377 DOI: 10.1021/jf60228a050] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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2555
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Doner LW, Krueger HW, Reesman RH. Isotopic composition of carbon in apple juice. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 1980; 28:362-364. [PMID: 7391373 DOI: 10.1021/jf60228a051] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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2556
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Singer L, Ophaug RH, Harland BF. Fluoride intakes of young male adults in the United States. Am J Clin Nutr 1980; 33:328-32. [PMID: 7355803 DOI: 10.1093/ajcn/33.2.328] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
The total daily fluoride intake for young male adults living in four geographical areas of the United States has been estimated by the analysis of "market basket collections" obtained in 1975 and 1977. The fluoride intake in 1975 vaired from 0.912 mg/day in an unfluoridated city (Kansas City, Mo.) to 1.720 mg/day in a fluoridated city (Atlanta, Ga.). The 1977 collection from San Francisco, Calif. contained more fluoride (1.636 mg/day) than the 1975 collection (1.213 mg/day). The level of intake found in this study is less than that reported by San Filippo and Battistone (Clin. Chem. Acta 31: 453, 1971) who analyzed similar collections from Baltimore, Md. in 1967 to 1968 (2.09 to 2.34 mg/day). This study, as well as the earlier one, indicates that relatively low levels of fluoride are being consumed in the United States by the young adult male 16 to 19 years of age.
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2557
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Report prepared by the Metallic Impurities in Organic Matter Sub-Committee. Determination of small amounts of antimony in organic matter. Analyst 1980; 105:66-74. [PMID: 7386891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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2558
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Lesage S. Effect of cupric ions on the analysis of ethylenebis(dithiocarbamate) residues in tomato juice. JOURNAL - ASSOCIATION OF OFFICIAL ANALYTICAL CHEMISTS 1980; 63:143-5. [PMID: 7380785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Cupric ions interfered with the carbon disulfide evolution assay method for dithiocarbamate residues in tomato juice and in aqueous solution. Amounts of residue determined were reduced when CuSO4 and a formulation of copper fungicide (Copper-Count-N) were present in the solutions analyzed.
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2559
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Johnson RD, Manske DD, New DH, Podrebarac DS. Pesticides and other chemical residues in infant and toddler total diet samples-(I)-August 1974-July 1975. PESTICIDES MONITORING JOURNAL 1979; 13:87-98. [PMID: 583446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Since 1964, the Food and Drug Administration, U.S. Department of Health, Education and Welfare, has reported residues of pesticides and other chemicals present in the average diet of the young adult male. The present report is the first in a series of market baskets whose purpose is to monitor the average diet of infants and toddlers for the same residues. Ten market baskets were collected in 10 cities which ranged in population from less than 50,000 to 1,000,000 or more. Averages and ranges of residues found are reported by food class. Results of recovery studies of known residues and chemicals within various food classes are also presented.
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2560
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Bruno P, Caselli M, Di Fano A, Traini A. Fast and simple polarographic method for the determination of free and total sulphur dioxide in wines and other common beverages. Analyst 1979; 104:1083-7. [PMID: 547741 DOI: 10.1039/an9790401083] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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2561
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Dale NE. Sodium and potassium content of some Australian foods and beverages. Med J Aust 1979; 2:354-5. [PMID: 514184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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2562
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Jeuring HJ, van den Hoeven W, van Doorninck P, ten Broeke R. Rapid determination of quinine in soft drinks by reversed phase ion pair chromatography. ZEITSCHRIFT FUR LEBENSMITTEL-UNTERSUCHUNG UND -FORSCHUNG 1979; 169:281-3. [PMID: 516917 DOI: 10.1007/bf01193795] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Quinine can easily be determined in soft drinks by means of reversed-phase ion-pair chromatography. Sample preparation is not necessary. Quinine is detected by fluorescence and UV spectrophotometry by continuous monitoring of the column effluent. A rectilinear response is obtained in the concentration range of 20--100 mg/l. The complete assay procedure takes about 8 min.
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2563
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Wendland BE, Arbus GS. Oral fluid therapy: sodium and potassium content and osmolality of some commercial "clear" soups, juices and beverages. CANADIAN MEDICAL ASSOCIATION JOURNAL 1979; 121:564-6, 568, 571. [PMID: 497946 PMCID: PMC1704416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Analysis of nearly 90 commercial "clear" fluids, including soups, juices, fruit-flavoured drinks and ices, carbonated beverages and gelatins, showed a range of 0.1 to 251 mmol of sodium and 0.0 to 65 mmol of potassium per litre; the osmolality ranged from 246 to more than 2000 mOsm/kg of water. Knowledge of these values is useful in the home or hospital management of patients for whom control of fluid and electrolyte intake is indicated. The results of the analyses are presented in tabular form for use by physicians and nutritionists when counselling patients to ingest clear-type fluids for various illnesses. Examples are given using these data to show how clear-fluid therapy can be tailored in one such illness--gastroenteritis (infectious diarrhea).
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2564
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Adair SM, Wei SH. Fluoride content of commercially prepared strained fruit juices. Pediatr Dent 1979; 1:174-6. [PMID: 298758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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2565
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Woodward BB, Heffelfinger GP, Ruggles DI. High pressure liquid chromatographic determination of sodium saccharin, sodium benzoate, and caffeine in soda beverages: collaborative study. JOURNAL - ASSOCIATION OF OFFICIAL ANALYTICAL CHEMISTS 1979; 62:1011-9. [PMID: 528441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A collaborative study for the determination of sodium saccharin, sodium benzoate, and caffeine in 3 types of soda beverage, cola, grape, and lemon-lime, has been completed using reverse phase high pressure liquid chromatography with a muC18 column and acetic acid mobile phase. Recoveries for sodium saccharin were 98.6, 98.0, and 99.1%; for sodium benzoate, 100.6, 102.6, and 100.6%; and for caffeine, 100.8, 101.4, and 101.1%, respectively. The method has been adopted as official first action.
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2566
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Elkins ER, Sulek A. Atomic absorption determination of tin in foods: collaborative study. JOURNAL - ASSOCIATION OF OFFICIAL ANALYTICAL CHEMISTS 1979; 62:1050-3. [PMID: 528446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Samples of green beans, applesauce, and a fruit juice were fortified with tin at 3 levels. Collaborators were asked to digest the samples, using HNO3-H2SO4, add methanol to enhance the absorption signal, and aspirate directly, using a nitrous oxide-acetylene flame. Results were received from 8 laboratories including 4 from Europe. However, only 6 laboratories used the prescribed methodology. All results were considered acceptable. The method has been adopted as interim official first action.
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2567
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Vega-Franco L, Flores Terres de la L, Meza Camacho C. [Concentration of lead in fruit juices packed in tin containers]. SALUD PUBLICA DE MEXICO 1979; 21:583-91. [PMID: 550329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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2568
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Moore MR, Hughes MA, Goldberg DJ. Lead absorption in man from dietary sources. The effect of cooking upon lead concentrations of certain foods and beverages. Int Arch Occup Environ Health 1979; 44:81-90. [PMID: 521168 DOI: 10.1007/bf00386741] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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2569
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Rouseff RL, Ting SV. Quantitation of polymethoxylated flavones in orange juice by high-performance liquid chromatography. J Chromatogr A 1979; 176:75-87. [PMID: 546912 DOI: 10.1016/s0021-9673(00)92088-0] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A quantitative high-performance liquid chromatographic (HPLC) procedure for the determination of the five major polymethoxylated flavones (PMFs) in orange juice has been developed. It employs a unique ternary solvent system with coupled UV-fluorescence detection. The dual detectors were employed to determine the presence of interfering substances and served as a cross check on quantitation. Stop flow UV and fluorescence scanning was used to identify peaks and determine the presence of impurities. Although all five citrus PMFs fluoresce, some HPLC fluorescence peaks were too small to be of much practical use. All five citrus PMFs could be quantitated satisfactorily with the fixed wavelength UV (313 nm) detector. The HPLC procedure has been used to evaluate each step in the preparation. The optimum extracting solvent was selected and one time consuming step was eliminated, as it was found to be unnecessary. HPLC values for nobiletin and sinensetin are in good agreement with the thin-layer chromatographic (TLC) values in the literature. HPLC values for the other three flavones were considerably lower than those reported in the literature. The HPLC procedure is considerably faster than the TLC procedure with equal or superior precision and accuracy.
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2570
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Ito Y, Ogawa S, Iwaida M. Gas-liquid chromatographic determination of adipic acid in crackling candy and soft drinks. JOURNAL - ASSOCIATION OF OFFICIAL ANALYTICAL CHEMISTS 1979; 62:937-8. [PMID: 500542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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 less than 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 methograph 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 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.
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2571
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Wedzicha BL, Johnson MK. A variation of the Monier-Williams distillation technique for the determination of sulphur dioxide in ginger ale. Analyst 1979; 104:694-6. [PMID: 496024 DOI: 10.1039/an9790400694] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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2572
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2573
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Shinomiya M, Nakagaki H, Sakakibara Y. [Determination of sucrose contents in available foods and drinks. (I) Sucrose contents in some commerical soft drinks (author's transl)]. AICHI GAKUIN DAIGAKU SHIGAKKAI SHI 1979; 17:19-26. [PMID: 297435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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2574
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Siriwardana MG, Lafont P. [Densitometric method for the determination of patulin in fruit juices]. J Chromatogr A 1979; 173:425-8. [PMID: 546884 DOI: 10.1016/s0021-9673(00)92316-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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2575
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van Lierop BH, Nootenboom H. Gas-liquid chromatographic-mass fragmentographic determination of low levels of diethylcarbonate in beverages. JOURNAL - ASSOCIATION OF OFFICIAL ANALYTICAL CHEMISTS 1979; 62:253-6. [PMID: 447595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Sodium chloride and ethanol (omitted for samples with greater than 10% alcohol) are added to the beverage sample and the sample is allowed to equilibrate in a 30 degrees C water bath. An aliquot of the headspace is injected into a gas chromatography containing a column packed with 0.2% Carbowax 1500 on 80--100 mesh Carbopack C. During the elution of diethylcarbonate (DEC), an impurity that is present in diethylpyrocarbonate, the column effluent is vented to a mass spectrometer with a multiple ion detection system and operated in the electron impact mode. The ions at m/e 63 and 91 are monitored. Lemonade, fruit drinks, wine, and beer samples (138 total) were analyzed for DEC. Sixteen samples had greater than 30 ppb DEC. Eight analyses of a lemonade sample gave a mean of 88 ppb with a coefficient of variation of 11%.
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