3。SGS同学又说了,这是ECHA告诉他们的,还有原话,“This may, for example, be done by analysing the boron concentration and calculating on this basis the content of B4Na2O7 in your mixture or article.”, 但我想,如果我也发邮件征求ECHA的意见,说我按元素测试,完了有数据,我再通过其它手段,如FT-IR,或该物质的用途,判断说产品中不会含有这种SVHC,我想ECHA也是很高兴同意的;