摘要
根据纳氏比色法测定氨氯的原理，设计制造了名为“肉类新鲜度快速检测仪”的仪器，应用此自制的仪器，一件肉类样品的检测仅需8min。试验表明，吸光度与NH4^＋浓度在0～40mg／100g试样之间呈线性关系，其相关系数大于0．995，其检出限（3S／N）为0．5mg／100g。分析两件NH^＋浓度不同的试样，测定结果的平均RSD（n=8）值为3．5％
Based on the principle of the Nessler＇s eolorimetric determination of NH4^＋ ion, a new instrument, named ＂Rapid Determinator for Meat-freshness＂ was designed and fabricated. By using this self-made determinator, freshness of a meat sample was determined within 8 min. Linear relationship was obtained between the absorbance and concentration of NH4^＋ in the range of 0-40 mg per 100 g of sample, with its correlation coefficient over 0. 995 and detection limit of 2. 5 mg per 100 g （3S/N）. The average value of RSD＇s （n=8） found in the analysis of 2 samples with different concentrations of NH4^＋ was 3. 5 %,
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2006年第12期1032-1033,1062,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
肉类
新鲜度
纳氏试剂
快速测定仪
Meat
Freshness Nessler＇s reagent
Rapid determinator
