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怎样鉴别真假磷酸二铵

更新时间: 2020-07-06 00:00:00     

鉴别真假磷酸二铵的方法:

1、水溶法:取磷酸二铵少许,放入白色小玻璃瓶或白色水杯中,加入水50毫升摇动片刻,静置几分钟后,不溶化的是水泥制品,混浊发黑的为粉煤灰制品,上层清澈溶液较多的是磷酸二铵真品,下层混浊也较多的为硝酸磷钾;

2、DH测试纸:取磷酸二铵样品的水溶液进行pH值检测,磷酸二铵呈碱性,pH值8至8.5.硝酸磷肥pH值6至7呈弱酸性,水泥pH值9至10呈碱性,粉煤灰pH值7至8呈弱碱性;&nb

关键词: 怎样 鉴别 真假 磷酸

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