000			02448nab a22003737a 4500
999			_c61970 _d61962
001			61970
003			MX-TxCIM
005			20200601164855.0
008			180103s1994 ne |||p|op||| 00| 0 eng d
022			_a0039-9140
024	8		_ahttps://doi.org/10.1016/0039-9140(94)80165-7
040			_aMX-TxCIM
041			_aeng
100	1		_913563 _aTaylor, R.H.
245	1	0	_aCo-determination of sodium metabisulfite and starch in corn syrup by flow injection coulometry
260			_aAmsterdam (Netherlands) : _bElsevier, _c1994.
500			_aPeer review
520			_aDuring the processing of corn syrup for commercial use, starch, in the form of α -amylose, must be completely broken down to its D -glucopyranose units. Sodium metabisulfite is added to the corn syrup as a preservative. Flow Injection Coulometry was used to perform an automated assay of these analytes, both individually and jointly. The sodium metabisulfite concentration, over a range of 3.5 × 10−4−2.9 × 10−2M, is determined by coulometric flow injection titration with generated iodine, using spectrophotometric endpoint detection at 530 nm. Analysis over this range produced a relative standard deviation of < 1.5% and was found to correlate very well with manual titrations. The determination was performed in the presence of varying amounts of starch, and was found to be independent of the starch concentration. Starch was determined, when no sodium metabisulfite was present, from the absorbance level after the reaction of the sample with a specific amount of iodine. In the presence of sodium metabisulfite, the rate of the accumulation of the starch/iodine interaction product after the metabisulfite titration endpoint, at a constant reagent generation rate, was used. A relative standard deviation of < 1.4% was obtained for all starch analyses, with a very good correlation (correlation coefficients ⪖0.997) with the known relative concentration. The use of the FIC technique to perform analyses by specific amount and excess reagent generation is demonstrated, along with dual analyte determination.
546			_aText in English
650		7	_913564 _aHigh fructose corn syrup _2AGROVOC
650		7	_95810 _aStarch _2AGROVOC
650		7	_913565 _aPreservatives _2AGROVOC
700	1		_913566 _aRotermund, J.
700	1		_913567 _aChristian, G.D.
700	1		_913568 _aRuzicka, J.
773	0		_gv. 41, no. 1, p. 31-38 _tTalanta _x0039-9140 _dAmsterdam (Netherlands) : Elsevier, 1994.
942			_2ddc _cJA _n0