Formaldehyde or formalin is highly toxic that is absorbed pleasantly by inhalation. The object of this research was to analyze formalin that contaminated in seafood and frozen meat. The method was to select samples at...Formaldehyde or formalin is highly toxic that is absorbed pleasantly by inhalation. The object of this research was to analyze formalin that contaminated in seafood and frozen meat. The method was to select samples at Kalasin Province. The samples were mackerel, crisp squid, frozen chicken, Saba fish, Shishamo fish, Jelly fish, Cockle, Clams, Squid, shrimp, White shrimp and Dolly fish, respectively. The methods were to analyze formaldehyde with titration and formalin test kit. Titration method used formic acid by excess of iodine in alkaline solution. Formalin test kit?of Ministry of Public Health issued Act No.151 (B.E.2536) was to test formalin contaminated food.?The results found formaldehyde in mackerel, crisp squid, frozen chicken, Saba fish, Shishamo fish, jelly fish, cockle, clams, squid, shrimp, white shrimp and dolly fish in three replicated were 288 mg/L, 228 mg/L, 293 mg/L, 77 mg/L, 282 mg/L, 180 mg/L, 120 mg/L, 48 mg/L, 229 mg/L, 294 mg/L, 295 mg/L and 293 mg/L, respectively. Formalin test kit was to found all samples were contaminated with formalin. Moreover, the height formalin contaminated in white shrimp, the second were shrimp and dolly fish, the third was frozen chicken, the fourth was mackerel, the fifth was Shishamo fish, the sixth was squid, the seventh was crisp squid, the eighth was jelly fish, the ninth was cockle, the tenth was Saba fish and the last was clam. The World Health Organization classified formaldehyde was carcinogenic to humans, considerately that there was a decent proof for inflicting cavity cancer in humans.展开更多
文摘Formaldehyde or formalin is highly toxic that is absorbed pleasantly by inhalation. The object of this research was to analyze formalin that contaminated in seafood and frozen meat. The method was to select samples at Kalasin Province. The samples were mackerel, crisp squid, frozen chicken, Saba fish, Shishamo fish, Jelly fish, Cockle, Clams, Squid, shrimp, White shrimp and Dolly fish, respectively. The methods were to analyze formaldehyde with titration and formalin test kit. Titration method used formic acid by excess of iodine in alkaline solution. Formalin test kit?of Ministry of Public Health issued Act No.151 (B.E.2536) was to test formalin contaminated food.?The results found formaldehyde in mackerel, crisp squid, frozen chicken, Saba fish, Shishamo fish, jelly fish, cockle, clams, squid, shrimp, white shrimp and dolly fish in three replicated were 288 mg/L, 228 mg/L, 293 mg/L, 77 mg/L, 282 mg/L, 180 mg/L, 120 mg/L, 48 mg/L, 229 mg/L, 294 mg/L, 295 mg/L and 293 mg/L, respectively. Formalin test kit was to found all samples were contaminated with formalin. Moreover, the height formalin contaminated in white shrimp, the second were shrimp and dolly fish, the third was frozen chicken, the fourth was mackerel, the fifth was Shishamo fish, the sixth was squid, the seventh was crisp squid, the eighth was jelly fish, the ninth was cockle, the tenth was Saba fish and the last was clam. The World Health Organization classified formaldehyde was carcinogenic to humans, considerately that there was a decent proof for inflicting cavity cancer in humans.
文摘目的 建立基于长短期记忆(longshort-termmemory,LSTM)神经网络的时间序列预测模型,对北京地区鲜(冻)肉制品铅含量进行风险评估与预测预警。方法 通过收集2011—2020年国家市场监督管理总局日常食品监督管理抽检数据,筛选出北京地区鲜(冻)肉制品的抽检数据,构建数据集并进行预处理,按照7:2:1的比例划分训练集、验证集和测试集,基于Tensorflow平台构建4层LSTM模型并进行训练,基于重大活动举办前10d的鲜(冻)肉制品铅含量数据,对未来1d的鲜(冻)肉制品铅含量风险进行预测。结果 经过50轮模型迭代训练,训练集和测试集Loss指标收敛至0.084,经过5次训练后的模型评估参数均方根误差(root mean square error,RMSE)为0.192,决定系数(coefficient of determination,R2_score)为0.916,模型误差较小、准确度较高。结论 基于LSTM的鲜(冻)肉制品铅含量风险预测模型整体性能较好,可应用于重大活动举办地的食品风险预测,并精准指导监督抽检。
