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研究了介质、酸度、CPA-pHA的用量、温度和测定波长对混合轻稀土和混合重稀土与CPA-pHA络合物的吸光度的影响。以包头稀土(铈组为主)和龙南稀土(钇组为主)作为标准研究了在某些介质中的吸收曲线并寻找出其相重或相近处的波长。采用4％HCI介质,0.0024％CPA-pHA及在680～690nm范围内的合适波长,测定大多数类型的稀土矿物中的稀土总量,由于采用同一的标准,故引起的偏差小于10％。
The effects of medium, acidity, dosage of CPA-pHA, temperature and measuring wavelength on the absorbance of mixed LREEs and mixed rare earths with CPA-pHA complexes were studied. Taking Baotou rare earth (mainly cerium group) and longan rare earth group (mainly yttrium group) as the standard, the absorption curves in some media are studied and the wavelengths of their relative or similar phases are found out. The determination of the total rare earths in most types of rare earth minerals using 4% HCI media, 0.0024% CPA-pHA and the appropriate wavelength in the 680-690 nm range is less than 10% due to the same standard.