四川乐山、泸州等地存在大规模用硫磺熏制鲜竹笋的违法现象1。尽管《食品安全国家标准 食品添加剂使用标准》(GB—2760—2024)明确规定硫磺不能用于熏蒸鲜笋1，但商人为了降低成本和延长保质期仍然广泛采用这一手段1。马边县市场监管局介绍，全县有38个中小型竹笋加工或临时存储场所1，这些熏制点多数隐蔽且监管薄弱1。
检测数据显示问题严重。记者从马边购买的竹笋经检测，二氧化硫每千克含量高达5.57克1，远超安全标准。古蔺县市场监管部门2024年查获1900公斤硫磺熏制竹笋，但仅对责任人杨某罚款500元1。市场监管总局10月12日通报贵州某公司清水竹笋、四川某公司手剥笋二氧化硫超标1。
从经济角度看，硫磺熏制吸引力巨大——成本一斤仅需几分钱1。相比之下，柠檬酸、低盐浸渍等替代方法每斤成本高3块1，液氮瞬时锁鲜技术初期投资需几十万元，处理后竹笋每斤需卖25块才能回本1。
专家警示长期食用风险。山西大学生命科学学院教授仪慧兰表示，工业硫磺带入的重金属会在肝肾蓄积，其中砷属一类致癌物1。业内人士指出，无硫保鲜技术已成熟，需要加强监管、推广替代技术并引导产业升级1。
Bamboo shoot producers in Sichuan's Leshan and Luzhou regions have been illegally using sulfur to fumigate fresh bamboo shoots despite explicit national prohibitions. 1 The National Standard for Food Additives Use (GB-2760-2024) explicitly bans sulfur from being used for fumigating fresh bamboo shoots, yet traders continue the practice to extend shelf life and reduce costs. 1 Testing of bamboo shoots purchased from Mabian County revealed sulfur dioxide content reaching 5.57 grams per kilogram, far exceeding safe limits. 1
The enforcement response has been minimal. In Gulin County, authorities seized 1,900 kilograms of sulfur-fumigated bamboo shoots in 2024 but imposed only a 500-yuan fine on the responsible party, surnamed Yang. 1 The Mabian County Market Supervision Administration confirmed the existence of 38 small and medium-sized bamboo shoot processing or temporary storage facilities in the county. 1 In October, the State Administration for Market Regulation reported that clear water bamboo shoots from a company in Guzhou and hand-peeled bamboo shoots from a Sichuan company exceeded sulfur dioxide standards. 1
The economic barrier to eliminating the practice lies in production costs. Sulfur fumigation costs only a few cents per pound, while alternative methods such as citric acid and low-salt immersion preservation require an additional 3 yuan per pound. 1 Liquid nitrogen flash-freezing technology demands an initial investment of hundreds of thousands of yuan, with processed bamboo shoots requiring a retail price of 25 yuan per pound to break even. 1 Professor Yi Huilan from Shanxi University's School of Life Sciences warned that industrial sulfur introduces heavy metals that accumulate in the liver and kidneys, with arsenic classified as a Class 1 carcinogen. 1
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