Titratable acidity
We plan to compare acid amounts expressed as a reference acid.
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Food Lab
Practice weighing, titration, drying, and microbial result interpretation with virtual food samples.
Virtual conditions for education
An independent educational simulation. Not affiliated with or endorsed by HRD Korea, Q-net or MFDS. Virtual results do not establish food safety or guarantee exam success.
Explore all Food Lab concepts →6 experiments
Times include reading the explanation and completing all six steps. Your pace may vary.
Solutions & titrationNaOH solution preparation and standardization
Weigh and dilute to volume, then use standard acid to determine NaOH concentration and its factor.
AdvancedAbout 20 min
Solutions & titrationSalt determination (Mohr)
Use the precipitation endpoint and aliquot factor to determine NaCl-equivalent content.
AdvancedAbout 20 min
Gravimetric analysisMoisture determination
Calculate loss on drying from masses before and after drying and constant-mass records.
IntermediateAbout 15 min
Gravimetric analysisAsh determination
Distinguish residue after ashing from sample loss.
IntermediateAbout 15 min
Microbiological analysisAerobic plate count
Count colonies on serially diluted replicate plates and calculate CFU.
AdvancedAbout 20 min
Microbiological analysisQualitative coliform test
Link presumptive, confirmed and completed-test evidence to read qualitative results.
AdvancedAbout 20 min
Extension topics in preparation
10 in preparation
Acid value of fats and oils
We plan to explore free fatty acids in fats and oils and blank correction.
Vitamin C determination
After reviewing the analytical method, we plan to explore redox reactions and recovery.
Crude fat determination
We plan to connect extraction, solvent recovery, and residue weighing.
Crude protein determination
We plan to explore nitrogen determination and food-specific protein conversion factors.
Peroxide value
We plan to explore an oxidation indicator and the effects of light protection and blanks.
pH versus titratable acidity
We plan to compare hydrogen ion activity and titrant consumption.
Iodine value
We plan to explore the relation between unsaturation and back titration.
Saponification value
We plan to explore back titration of the alkali remaining after reflux.
Unsaponifiable matter
We plan to explore the residue separated and extracted after saponification.