1.4 Maple Syrup Density Measurement. 1.4.1 Background; 1.4.2 Hydrometers; 1.4.3 Hydrotherms; 1.4.4 Refractometers . 1.4.4.1 Optical Refractometers; 1.4.4.2 Digital Refractometers; 1.4.5 Temperature Correction; 1.4.6 Instrument Calibration . 1.4.6.1 Hydrometers; 1.4.6.2 Thermometers; 1.4.6.3 Refractometers; 1.4.7 Collecting a Representative Sample
Because of this distinction, you may safely use fish even after the sell by date has lapsed. If there is a use-buy date on fresh fish, then it is recommended to either cook or freeze the fish by that date. Commercially frozen fish, if kept frozen, can be safely stored for 10-12 months.
A newly caught fish is far fresher than any fish you'll ever buy in a shop. In fact, a freshly caught trout or salmon will have a shelf life of about 9 days at 0&deg C. But what does this mean in real life? Can we really keep it in the fridge and eat it a week later? The answer, sadly, is no.Let's take a look at the details. Once home, the fish is quickly cleaned and stored in the fridge for eating the following evening (or frozen but allowing 1 day to defrost in the fridge). 2  6 hours at 15&deg C is equivalent to 36 hours at 0&deg C (6 x 6 hours).