^<241>Am線源によるヨウ素のケイ光X線分析

抄録

Determination of iodine in organic iodine compound and in the see-weed "Wakame"(Undaria pinnatifida) by non-dispersive fluorescence X-ray analysis was carried out, employing ²⁴¹Am (100 mCi) source. A detector of 13/(4)"φ×1" NaI(Tl) scintillation crystal and a 400-channel pulse height analyzer were employed for the X-ray spectrum measurement. The analysis can be made within 10 minutes with the standard deviation of less than 1% for samples containing more than 0.1% iodine. In the case of Wakame, iodine is concentrated by ashing and can be determined up to 80 ppm. The results obtained by this method show 2-3% greater values than those by a conventional pharmacopoeial method. The present method is simple, has good reproducibility, and seems to be well applicable to the analysis of pharmaceutical preparations.