2011
DOI: 10.1590/s0102-09352011000600037 View full text |Buy / Rent full text
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Abstract: High performance liquid chromatography was used in order to detect cheese whey in samples of raw milk preserved with Bronopol ® . Six samples were collected and divided in 45 aliquots of 40mL. From these, 15 were used as control and stored frozen, 15 were added with Bronopol ® and stored at 7ºC, and the other 15 were added with Bronopol ® and stored at 30ºC. In all groups, five levels of cheese whey addition (0, 2, 5, 10, and 20%) were tested. The samples were submitted to high performance liquid chromatograph… Show more

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“…Different mobile phase Water: ACN: Phosphate Buffer (94.5:5:0.5), Methane: Water: Orthophosphoric acid, Ethanol: 1% acetic acid (13:87), Methanol: THF: Water (5:5:100), 0.1% phosphoric acid in Water: Methanol: 0.1% phosphoric acid in ACN were tried for detection of bronopol and kathon as per reported literature. The reported wavelength range for detection of bronopol was 210-260 nm and for kathon was 250-280 nm (Paul et al 2011;Lasmar et al 2011;Jie and Jinhui 2000). In HPLC analysis isocratic elution using 0.1% phosphoric acid in water: Methanol: 0.1% phosphoric acid in acetonitrile (80:10:10) as mobile phase and wavelength of 250 nm for bronopol and 274 nm for kathon was standardized on the basis of maximum height and peak area.…”
Section: Resultsmentioning
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rupbmjkragerfmgwileyiopcupepmcmbcthiemesagefrontiersapsiucrarxivemeralduhksmucshluniversity-of-gavle
“…Different mobile phase Water: ACN: Phosphate Buffer (94.5:5:0.5), Methane: Water: Orthophosphoric acid, Ethanol: 1% acetic acid (13:87), Methanol: THF: Water (5:5:100), 0.1% phosphoric acid in Water: Methanol: 0.1% phosphoric acid in ACN were tried for detection of bronopol and kathon as per reported literature. The reported wavelength range for detection of bronopol was 210-260 nm and for kathon was 250-280 nm (Paul et al 2011;Lasmar et al 2011;Jie and Jinhui 2000). In HPLC analysis isocratic elution using 0.1% phosphoric acid in water: Methanol: 0.1% phosphoric acid in acetonitrile (80:10:10) as mobile phase and wavelength of 250 nm for bronopol and 274 nm for kathon was standardized on the basis of maximum height and peak area.…”
Section: Resultsmentioning
“…(138) A common fraud is the addition of liquid cheese whey to pasteurized, ultra high temperature (UHT), sterilized or powdered milk, which has a negative effect on the yield and nutritional characteristics of milk. (139) Cheese whey adulteration in milk can be detected by identification of a glycomacropeptide (GMP) which is present only in cheese whey and absent in milk. Caseinomacropeptide (CMP) level in cheese whey is about 1.2-1.5 g/L.…”
Section: Cheese Wheymentioning
“…Recently, in Brazil was reported that commercial ultra-high temperature milks available in the Brazilian market presented at least one adulterant, such as starch, chlorine, formaldehyde, hydrogen peroxide and urine [4]. Moreover, the addition of cheese whey in fluid milk has already been reported [5]. This adulteration could be identify by individual analytical procedures such as phosphor partition [6], western blot immunoassay [7], liquid chromatography-electrospray-tandem mass spectrometry analysis [8], but these procedures are not accuracy, take a long time and are expensive [9].…”
Section: Introductionmentioning