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- Title
浓度直读法快速测定市售腌菜中的硝酸盐和亚硝酸盐含量.
- Authors
郭楠楠; 王占华; 许冰洁
- Abstract
In this study, the establishment of a rapid determination method for nitrate and nitrite content is explored. The results show that when pH is 2~6, add 1 mL amino sulfonic acid solution to eliminate the interference of NO2-. Based on this, the concentration direct reading method is used to determine the nitrate and nitrite content in five types of commercially available pickled vegetables. The nitrite content ranges from 2.76 mg/kg to 67.5 mg/kg, the nitrate content ranges from 37.58 mg/kg to 149.7 mg/kg, and the recovery rates are between 91.0% and 110.0%. Compared with the second method in GB 5009.33-2016, there is no significant difference between the results of F test and t test. Compared with the method in national standard, this method has the advantages of simple operation, no need for complex calculations, fast measurement speed, and easy portability of the instrument, making it suitable for the determination of nitrite and nitrate content in pickled vegetables.
- Subjects
NITRITES; SULFONIC acids; AMINO acids; VEGETABLES; F-test (Mathematical statistics)
- Publication
China Condiment, 2024, Vol 49, Issue 1, p146
- ISSN
1000-9973
- Publication type
Article
- DOI
10.3969/j.issn.1000-9973.2024.01.025