Methods: Effect on NDMA and scavenging rate sodium nitrite was tested by colorimetric analysis and ultraviolet irradiation and decomposition.

• 方法：用比色法及紫外光解法测定了榛叶提取物对二甲基亚硝胺(NDMA)体外合成的阻断作用及对亚硝酸钠的清除作用。