CAJ | 학술논문

石墨化学性质稳定，需采用高温碱熔（1000℃）才可使样品分解完全，已有分析方法在样品前处理不同的阶段使用不同材质的坩埚。基于石墨性质和坩埚熔样情况，本文采用预先已均匀铺垫0．50 g 碳酸钾的高熔点铂坩埚灼烧石墨样品，样品灼烧后直接在原坩埚中加入0．80 g 碳酸钠碱熔，熔融物用稀盐酸提取后用电感耦合等离子光谱法（ICP －OES）实现了石墨中8种常量元素（硅铝钙镁铁钛锰磷）的同时测定。方法检出限为13～228μg／g，方法精密度（RSD，n ＝12）为0．7％～7．2％；全流程加标回收率为90．5％～105．0％；实际土状和鳞片石墨样品的测定结果与化学分析法无显著差异。本方法避免了铂坩埚的损毁和样品在前处理过程中的损失，分析过程简单、分析速度快。
석묵화학성질은정，수채용고온감용（1000℃）재가사양품분해완전，이유분석방법재양품전처리불동적계단사용불동재질적감과。기우석묵성질화감과용양정황，본문채용예선이균균포점0．50 g 탄산갑적고용점박감과작소석묵양품，양품작소후직접재원감과중가입0．80 g 탄산납감용，용융물용희염산제취후용전감우합등리자광보법（ICP －OES）실현료석묵중8충상량원소（규려개미철태맹린）적동시측정。방법검출한위13～228μg／g，방법정밀도（RSD，n ＝12）위0．7％～7．2％；전류정가표회수솔위90．5％～105．0％；실제토상화린편석묵양품적측정결과여화학분석법무현저차이。본방법피면료박감과적손훼화양품재전처리과정중적손실，분석과정간단、분석속도쾌。
Graphite is a stable nonmetal and must be decomposed completely by alkali fusion at high temperature (1000℃).In previous methods,different crucibles were used in different phases in order to shorten the utility time of the platinum crucible and avoid damage to the platinum crucible and sample loss.Based on the nature of graphite ore and the character of the crucible,a new method has been developed.The sample was firstly ignited at high temperature in a platinum crucible,which was prepared with 0.50 g potassium carbonate at the bottom.The sample was then directly digested by 0.80 g sodium carbonate in the former platinum crucible.Lastly the melt was dissolved by diluting hydrochloric acid.Eight major elements (Si,Al,Ca,Mg,Fe,Ti,Mn,P) were simultaneously determined by Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES ). The proposed method has a detection limit of 13 -228 μg/g,precision (RSD,n =12)of 0.7% -7.2%,and whole-process recoveries of 90.5% -105.0%.The analytical results of flake graphite and amorphous graphite by this method are in agreement with those by chemical method.This method avoids sample loss and platinum crucible damage.The whole process of treatment is simple and rapid.