{"title":"A Simplified Pretreatment for the Detection of Asbestos in Waste Gypsum","authors":"Harada Mihoko, Morio Hiura","doi":"10.3985/JJSMCWM.2120703","DOIUrl":null,"url":null,"abstract":"We devised a new pretreatment to analyze asbestos in gypsum boards that are discarded when building new structures and demolishing old ones. In this pretreatment, crushed gypsum board powder is dissolved in a water solution of ammonium formate. Then, insoluble asbestos can be separated on filter paper for XRD analysis. This pretreatment is simpler than the determination of asbestos in building material products (JIS A 1481), and XRD analysis can confirm chrysotile of 0 . 1 wt% or greater in gypsum. This method can only be applied for the analysis of gypsum, but it can be used effectively for confirming asbestos in amounts of 0 . 1 wt% or greater in the gypsum for the purpose of avoiding asbestos in it.","PeriodicalId":432877,"journal":{"name":"Journal of The Japan Society of Material Cycles and Waste Management","volume":"90 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of The Japan Society of Material Cycles and Waste Management","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3985/JJSMCWM.2120703","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
We devised a new pretreatment to analyze asbestos in gypsum boards that are discarded when building new structures and demolishing old ones. In this pretreatment, crushed gypsum board powder is dissolved in a water solution of ammonium formate. Then, insoluble asbestos can be separated on filter paper for XRD analysis. This pretreatment is simpler than the determination of asbestos in building material products (JIS A 1481), and XRD analysis can confirm chrysotile of 0 . 1 wt% or greater in gypsum. This method can only be applied for the analysis of gypsum, but it can be used effectively for confirming asbestos in amounts of 0 . 1 wt% or greater in the gypsum for the purpose of avoiding asbestos in it.
我们设计了一种新的预处理方法来分析在新建和拆除旧建筑时丢弃的石膏板中的石棉。在这种预处理中，粉碎的石膏板粉末溶解在甲酸铵水溶液中。然后将不溶性石棉用滤纸分离，进行XRD分析。该预处理方法比测定建筑材料制品中石棉(JIS A 1481)简单，XRD分析证实温石棉为0。1 wt%或更大的石膏。本方法仅适用于石膏的分析，但可有效地用于确定0。在石膏中添加1wt %或更大，以避免其中含有石棉。
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