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Production and evaluation of caffeine certified reference materials for its assessment in milk chocolate and coffee / Eman Adel Hassan Rend ; Supervised Mahmoud Sabry Mohamed Rizk , Adel Bassiouny Elsayed Shehata

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Cairo : Eman Adel Hassan Rend , 2015Description: 109 P. : charts ; 25cmOther title:
  • إنتاج وتقييم مواد مرجعية للكافيين لإستخدامها فى تقييم شيكولاتة الحليب والقهوة [Added title page title]
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  • Issued also as CD
Dissertation note: Thesis (M.Sc.) - Cairo University - Faculty of Science - Department of Analytical chemistry Summary: Reference 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
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Item type Current library Home library Call number Copy number Status Date due Barcode
Thesis Thesis قاعة الرسائل الجامعية - الدور الاول المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.12.08.M.Sc.2015.Em.P (Browse shelf(Opens below)) Not for loan 01010110068008000
CD - Rom CD - Rom مخـــزن الرســائل الجـــامعية - البدروم المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.12.08.M.Sc.2015.Em.P (Browse shelf(Opens below)) 68008.CD Not for loan 01020110068008000

Thesis (M.Sc.) - Cairo University - Faculty of Science - Department of Analytical chemistry

Reference 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

Issued also as CD

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