Analysis of nitrite monitoring in bulk ready-to-eat cooked meat products in Henan Province,2014-2023
Objective To assess the nitrite residual levels in bulk ready-to-eat cooked meat sold in Henan Province,providing insights for food safety risk assessment and regulatory measures.Methods A total of 10 659 cooked meat samples were collected from 17 municipalities and Jiyuan of Henan from 2014 to 2023.Nitrite levels were measured using a spectrophotometric method,adhering to national standard.Results The detection rate for nitrite in cooked meat was 68.41％,with an exceeding rate of 9.16％.The median M(P25,P75)nitrite levels were 3.70(0.50,11.00)mg/kg,and the maximum value was 1 830.00 mg/kg.Soy sauce and marinated meat products as well as offal products,exhibited significantly higher exceedance rates of 10.50％and 9.98％,respectively,compared to other categories(x2=94.762,P＜0.001).Cooked beef and pork products sourced from farmers'markets and shops had notably higher nitrite exceedance rates of 22.38％and 15.20％,and 15.59％and 5.90％,respectively,compared to cooked poultry products at 4.66％and 2.80％,with statistically significant differences(x2=140.412,P＜0.001 for beef;x2=83.262,P＜0.001 for pork).Cooked meat from farmers'market had higher median nitrite levels of 5.89(1.10,16.00)mg/kg,which were significantly higher than other sampling segments(H=295.994,P＜0.001).The eastern region of Henan showed a significantly higher exceedance rates of 25.63％compared to other regions(x2=190.346,P＜0.001).There had been a significantly decrease in nitrite exceedance rates and content levels in bulk ready-to-eat cooked meat from 2014-2023(R=-0.109,P＜0.001;Kendall's tau-b=-0.100,P＜0.001).Conclusions While unregulated use of nitrite in Henan's bulk ready-to-eat cooked meat products has improved,some regions still exhibit high exceedance rates and residual levels.Continuous strengthening of supervision is recommended,with a particular focus on soy and marinated animal meat products.
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