1, look at the color: under normal circumstances, fresh cauliflower made into dried vegetables, its color will become darker. If you see the dry cauliflower "color fascinating", most of the sulfur dioxide serious overload. Its appearance of golden, light yellow, light white, are not normal, and yellow with brown-black more reliable. In addition, the normal yellow cauliflower color uniform, and sulfur dioxide smoked yellow cauliflower color is not uniform.
2, smell: buy dried cauliflower can smell, do not buy a stimulating odor. Normal dried cauliflower has its own flavor, no other smell, while the sulfur dioxide smoked cauliflower has a pungent odor.
3, pinch with your hand: pinch the cauliflower with your hand into a handle, let go if the dry cauliflower can automatically disperse and return to its original shape, indicating that the dish is dry, good quality, if you let go after the shape is still into a ball can not be restored to its original shape, indicating that the dish is wet, easy to mold.