Induction cooktops are compatible with the following types of cookware: iron-based pots (enameled, cast iron, stainless steel), stainless steel pots, and specialized induction-compatible pots with composite bases. Additionally, the pot's base diameter must be at least 8 cm. If the pot's minimum diameter is less than 8 cm, the induction cooktop will not function. Furthermore, since the heating coil's magnetic field has a diameter of 22-26 cm, cookware within this magnetic field range is most suitable.
While induction cooktops are simple and practical with no smoke, fumes, or open flames, their inherent radiation makes users somewhat wary during daily use. The ideal induction-specific cookware primarily consists of iron or steel products. This is because such ferromagnetic materials match the heating load with the induced eddy currents during the heating process, resulting in high energy conversion efficiency. Consequently, magnetic field leakage is relatively minimal.
Regardless of induction cooktop type, cookware must be made of stainless steel, cast iron, or enameled materials. In terms of shape, induction cookware falls into two categories: some cooktops only accommodate flat-bottomed pans, while others accept both flat-bottomed and round-bottomed pans. Additionally, note that induction cookware requires specific bottom diameters—neither too large nor too small.
Choosing Cookware
1.From a design perspective, semi-circular wok-shaped pans ensure more even heating during stir-frying and facilitate better tossing, preventing uneven cooking results. Flat pans for induction cookers heat unevenly and are less suitable for tossing.
2. From a material perspective, cast iron has the poorest heat conductivity, followed by aluminum alloy, steel, and stainless steel. Therefore, cast iron pans offer better heat control.
3. From a nutritional perspective, trace metal elements inevitably leach into food during stir-frying. Cast iron typically contains no added trace elements during smelting. Trace iron is beneficial to human health, whereas other metals often incorporate added trace elements during processing.
Choose the right pan for the right dish
For stir-frying, you have two options: induction-compatible flat pans or traditional semi-circular wok pans. If choosing one, opt for the traditional semi-circular wok pan, preferably made of cast iron.
Techniques for stir-frying on induction cooktops
Since induction cooktops concentrate heat at the bottom of the pan, food burns easily. Timing is crucial.
For easily cooked dishes: After the pan heats up, reduce heat to low, add oil, then increase to medium. Add ingredients, adjust heat to medium, stir-fry briefly, then increase to high. Continue stir-frying. After 5 minutes, reduce heat to medium-low. By 7 minutes, the dish should be mostly cooked. If slightly underdone, stir-fry for another minute.
For tougher vegetables: After the wok heats up, reduce heat to low, add oil, then increase to medium. Add vegetables, stir-fry briefly at medium heat, then increase to high and continue stir-frying. At 7 minutes, add a small amount of water if needed, reduce heat to medium-low, and stir-fry until 9 minutes. The vegetables should be mostly cooked by then. If still slightly underdone, stir-fry for an additional minute.
Cast Iron Woks: Currently the Safest Cookware
According to reports, traditional Chinese cast iron woks are currently the safest kitchen utensils. Qualified cast iron woks are made from raw iron, typically free of other chemicals and unlikely to oxidize. During stir-frying or cooking, cast iron woks do not leach substances or shed particles. Even if trace iron is released, it offers health benefits when absorbed by the body.
It is reported that WHO experts also recommend using iron woks. The primary reason is their significant auxiliary role in preventing and treating iron-deficiency anemia. Under high temperatures, salt and vinegar react with iron, combined with friction from spatulas and spoons, causing the inorganic iron on the wok's inner surface to flake off into very fine powder.When absorbed by the body, this powder transforms into inorganic iron salts under the influence of stomach acid, serving as raw material for blood production and thus providing therapeutic benefits. While many foods contain iron, iron pots offer the most direct iron supplementation.
Usage Reminder: Ordinary iron pots are prone to rust. Excessive intake of iron oxide (rust) can harm the liver. Experts advise against leaving food in rust-prone iron pots overnight.Additionally, avoid using iron pots for prolonged soup cooking, as this can strip away the protective oil layer that prevents rusting. When cleaning, minimize detergent use to preserve this protective coating. After washing, thoroughly dry the pot to prevent rust formation. For minor rust spots, vinegar can be used for cleaning.
Nonstick Pans: Avoid High-Temperature Frying
According to China's environmental chemistry experts, ammonium perfluorooctanoate (PFOA) is a synthetic fluorinated polymeric acid. Due to its high stability, it is essential for producing non-stick coatings that prevent food adhesion. This non-stick coating is essentially a thin film approximately 0.2 millimeters thick. Dry heating or oil temperatures exceeding 300°C can damage this film.
It is understood that when using nonstick cookware, temperatures reaching 260°C can cause the decomposition of PFOA components within the coating. However, temperatures typically do not exceed 260°C during stir-frying. When preparing fried foods, however, pan temperatures may surpass 260°C.Experts note that water boils at 100°C. When cooking with a nonstick pan, temperatures typically do not exceed 100°C. Furthermore, when stir-frying, adding ingredients after the oil begins to smoke and cooking until the water boils usually results in dishes being nearly done without excessive heat.
Usage Reminder: Many dishes require frying or deep-frying, such as chicken wings or pork ribs. Since oil boils at 320°C, it remains extremely hot during frying, reaching very high temperatures that can easily cause harmful substances in nonstick coatings to break down. Therefore, avoid using nonstick pans for frying or deep-frying whenever possible.
Experts also caution against using metal spatulas with nonstick pans, as this accelerates coating degradation and may release harmful substances.
While many households favor iron woks for iron supplementation, and summertime raw tomatoes offer convenient nutrition, office workers often turn to vitamin supplements... Iron supplementation from iron woks is less effective than consuming blood tofu.