Several inorganic element of Hymeniacidon perleve are determined by EDXRF from August to November2002.At the same time,silicon in sponge was decreased.

• 分析了繁茂膜海绵在2002年8月到11月中主要无机元素的变化 ,发现繁茂膜海绵中的硅含量在降低。