Northeast sour cabbage by monitoring nitrite content in the fermentation process changes, to determine the fermentation 12d nitrite content below the limit standard, food is very safe.

Tsuli through monitoring during fermentation of nitrite content change, identifying 12 D fermentation nitrite content below the required standard, the limited edition is very safe for human consumption.

Through monitors the northeast sour cabbage in the fermentative process central Asia nitrate content change, determined ferments the 12d nitrous acid salt content to be lower than the stipulation to limit the quantity the standard, edible as sage as a house ad.

Northeast through monitoring changes of nitrite in acid in Chinese cabbage fermentation process, determining nitrite in fermentation 12d content below prescribed limits, eating very secure.

By monitoring the Northeast acid content of nitrite in Chinese cabbage fermentation process of change, determine fermenting below the requirements for 12d nitrite content standards, food very safe.