This study compared the common points and differences in determination parameters between Kappa number,Permanganate num-ber and Bjorkman number,analysed the advantages of Bjorkman number application on hardness monitoring for low-lignin-content pulps,and introduced the improvements in determination parameters of the company of Bjorkman number for the low-lignin-content pulps.The fea-sibility of the optimisation scheme was presented in terms of concentration and acidity of the solution,solid-liquid ratio of sample to reagent,reaction time and method repeatability.The 10-batch unbleached manila hemp detection data showed that the Permangate number was be-tween 3.5 and 4.2,with a fluctuation range of 0.7.The Bjorkman number was between 23.4 and 28.2,with a range of 4.8 which showed the Bjorkman number had better sensitivitj for low lignin content pulps.
维普
万方数据