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What is the Scoville Scale?
Scoville Scale is a benchmark which is used to identify how hot some chillies are. As we know, some peppers have a sweet taste while other chillies, even just a small amount of them, can let you feel that your tongue is on fire. From the chemistry point of view, the hotness of a chilli pepper is generated by the the amount of capsaicin. It is a special chemical compound found in chillies which can release the piquant heat when touching a human's taste buds. Generally, the crucial chemical which is responsible for the burning tongue, sweating and other feelings after chewing a pepper, capsaicin, can be found mostly in the ribs and seeds of a chilli pepper. The more capsaicin contained in a chilli, the hotter it will be.
Named after Wilbur L. Scoville, the Scoville Scale is defined to assign some scores for the hotness of those chillies. According to the definition of the Scoville Scale, the hotness is measured in units known as Scoville Heat Units (SHU). It is a unit indicating the number of times capsaicin needs to be diluted by sugar-water which can make people no longer feel the hotness of the chilli. Simply put, this unit indicates how much sugar-water needed to neutralize the spiciness or hotness of the original chilli to a plain taste. Here is a list of some common chillies from the perspective of Scoville Scale ratings. From this list, we can see the Carolina Reaper pepper is the hottest chilli in the world with an 2.2 million SHU. That means its capsaicin had to be diluted 2.2 million times with sugar water before the testers could no longer detect the spiciness. Let's make it simple, to dilute one ml of Carolina Reaper pepper capsaicin, it needs 2200 litre of sugar water, which equals to 2.2 tonnes of water, to do this job.
2,200,000 SHU: Carolina Reaper pepper
1,300,000 SHU: Naga Viper pepper
1,000,000 SHU: Ghost pepper
500,000 SHU: Red Savina pepper
100,000–350,000 SHU: Habanero pepper; Scotch bonnet pepper
30,000 – 50,000: Cayenne Pepper
6,000–23,000 SHU: Serrano pepper
5,000–10,000 SHU: Chipotle pepper
2,500–5,000 SHU: Jalapeño pepper
0 SHU: Bell pepper
How Accurate Is The Scoville Scale?
You may wonder if the SHU might be that accurate since the human's taste about the hotness varies widely from person to person which makes the Scoville rating a subjective measurement instead of an objective one. Moreover, the actual result may also be affected by other factors such as the growth conditions of the chilli such as the soil, water, sunlight and all other natural environmental factors. To ensure the accuracy of the result, there are some advanced processes such as a process called high-performance liquid chromatography which can be used to accurately measure the exact concentration of capsaicin in a chilli pepper. However, Scoville Scale is still widely used today by lots of people because of its simplicity of the definitions and usages. [YZz2OKElY70] |