The fat content of the SAMPLES was determined using a Goldfisch Fat Extraction A

Question

The fat content of the SAMPLES was determined using a Goldfisch Fat Extraction Apparatus. Approximately 2 g of SAMPLE was weighed into a Cellulose Extraction Thimble and the fat was extracted into a pre-weighed beaker. The beaker plus fat weight was recorded after removing the organic solvent and the fat content was determined by difference. Complete the following table showing calculations. 3) Beaker SAMPLE Beaker Plus Fat Crude Fat Crude Fat Mean Crude 62.3190 61.0892 SAMPLE Wt. (g) | Fat (%) Wt. (8) 62.3583 61.1266 Wt. (g) Content (96) 2.0259 1.9735 Broccoli

Explanation / Answer

Ans. Trial 1: Mass of crude fat = (Mass of beaker + fat) – Mass of beaker

                                                = 62.3582 g – 62.3190 g

                                                = 0.0392 g

# % crude fat = (Mass of crude fat / Mass of sample) x 100

                                    = (0.0392 g / 2.0259 g) x 100

                                    = 1.935 %

Trial 2: Mass of crude fat = (Mass of beaker + fat) – Mass of beaker

                                                = 61.1266 g – 61.0892 g

                                                = 0.0374 g

# % crude fat = (Mass of crude fat / Mass of sample) x 100

                                    = (0.0374 g / 1.9735 g) x 100

                                    = 1.895 %

# Now,

            Mean crude fat (%) = (% crude fat, trial 1 + % crude fat, trial 2) / 2

                                    = (1.935 % + 1.895 %) / 2

                                    = 1.915 %

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