Food Chemistery

 Food Chemistery Essay

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EXAMINATION OF MEALS AND ORGANIC PRODUCTS LAB EXERCISE

Perseverance of total nitrogen in food and crude proteins calculation (Kjeldahl method)

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Responsible person: Assoc. Prof. Ing. KateЕ™ina RiddellovГЎ, Ph level. D.

CONTENT MATERIAL

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Needed knowledge............................................................................................................................ a few Evaluative requirements................................................................................................................................ 3 Lab exercise content................................................................................................................. 3 Laboratory exercise timetable............................................................................................................... 4 A. TOTAL NITROGEN DETERMINATION ACCORDING TO THE KJELDAHL METHOD USING THE KJELTEC SYSTEM 1002............................................................................................. 5 1 . SCOPE............................................................................................................................................. 5 2 . STANDARD PRINCIPLE......................................................................................................................... a few 3. PRODUCTS, MATERIALS AND SPECIAL LAB GLASS..................................... a few 4. CHEMICAL COMPOUNDS AND SOLUTIONS.................................................................................................. 5 your five. PROCEDURE.................................................................................................................................. six 5. 1 Digestion.................................................................................................................................... 6 5. a couple of Distillation making use of the distillation device KJELTEC 1002.............................................................. 6 5. 2 . one particular Preparation from the distillation product....................................................................................... 6 five. 2 . two Sample handiwork.............................................................................................................. 7 a few. 2 . 3 Final washing of the device.................................................................................................... 7 5. 2 . four Closing down...................................................................................................................... 8 5. 3 Titration...................................................................................................................................... 8 a few. 3. you " Blank" titration.................................................................................................................. eight 5. a few. 2 Sample titration................................................................................................................... 8 5. 5 Calculation of results................................................................................................................. almost eight B. PHOSPHATE DETERMINATION IN LINE WITH THE KJELDAHL APPROACH USING THE PARNAS-WAGNER APPARATUS........................................................................................ 10 1 . OPPORTUNITY........................................................................................................................................... 10 installment payments on your BASIC RULE....................................................................................................................... 10 3. EQUIPMENT, SUPPLIES AND UNIQUE LABORATORY GLASS................................... 10 some. CHEMICALS AND SOLUTIONS...