000			02261cam a2200313 a 4500
003			EG-GiCUC
008			160227s2015 ua d f m 000 0 eng d
040			_aEG-GiCUC _beng _cEG-GiCUC
041	0		_aeng
049			_aDeposite
097			_aM.Sc
099			_aCai01.12.08.M.Sc.2015.Em.P
100	0		_aEman Adel Hassan Rend
245	1	0	_aProduction and evaluation of caffeine certified reference materials for its assessment in milk chocolate and coffee / _cEman Adel Hassan Rend ; Supervised Mahmoud Sabry Mohamed Rizk , Adel Bassiouny Elsayed Shehata
246	1	5	_aإنتاج وتقييم مواد مرجعية للكافيين لإستخدامها فى تقييم شيكولاتة الحليب والقهوة
260			_aCairo : _bEman Adel Hassan Rend , _c2015
300			_a109 P. : _bcharts ; _c25cm
502			_aThesis (M.Sc.) - Cairo University - Faculty of Science - Department of Analytical chemistry
520			_aReference materials are important tool in chemical analysis in terms of provision of traceability of the measurement results to the SI units. A Pure substance certified reference material from caffeine and matrix certified reference material of milk chocolate were developed for the content of caffeine and theobromine, theophylline and caffeine respectively. Homogeneity and stability of the prepared reference materials were studied and characterization was done by two independent analytical methods. The measurement results were statistically treated and the certified values of caffeine is 99.862 %±0.649 in pure substance certified reference material (caffeine) and they were 1393.2± 21.569, 0.499 ±0.054 and 112.48±3.897 mg/kg for theobromine, theophylline and caffeine in milk chocolate certified reference material which makes the candidate reference materials very useful as a calibrant and for quality achievement in chemical analysis
530			_aIssued also as CD
650		4	_aReferenc material and Homogeneity Study
653		4	_aCaffeine
653		4	_aMilk chocolate
700	0		_aAdel Bassiouny Elsayed Shehata , _eSupervisor
700	0		_aMahmoud Sabry Mohamed Rizk , _eSupervisor
905			_aNazla _eRevisor
905			_aSoheir _eCataloger
942			_2ddc _cTH
999			_c55201 _d55201