Study on the conditions for measuring stone cell content in pear flesh by freezing method

Ten pear cultivars, Nanguo, Anli, Dangshansu, Qiubai, Jinfeng, Wujiuxiang, Packhams, Housui, Whangkeumbae and Huangguan were used for studying the conditions for exactly measuring the stone cells in pear flesh by freezing method. Results showed that the best conditions needed for exactly measuring the stone cell content in pear flesh were as follows: 1.0 cm3 pulp dollop, frozen under -16℃～-20℃ for 24 hours, and blended 22000 r/min for 3 min; under such conditions the recovery rate of stone cell was 85.1%～94.1%, and the relative deviation of the method was 4.65%～11.56%. Such research achievement could be used for the establishment of the scientific and applied National Agriculture Industry Standard for measuring stone cells in pear flesh.