BS 4427-11-1983 工业用三磷酸钠(三磷酸五钠)和焦磷酸钠(焦磷酸四钠)的试验方法.各种磷酸盐形式的柱色谱分离和测定
Determination of ortho-, pyro- and tripolyphosphates, and higher condensed phosphate forms, in the absence of $7Itetra$7R- and $7Ipenta$7R-metaphosphates. To be read in conjunction with BS 4427-10:1976