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2 The analysis step by 25.0mL sample lixivium, moved in the direction of arsenic in the bottle, plus 10 ml of hydrochloric acid and 10 ml of potassium iodide solution and 5 drop acid stannochlor solution, shake the place 10min, together with 2 g of arsenic-free zinc metal, immediately mounted a good lead acetate paper turns red cotton and mercury bromide from log that arsenic tube placed in the 25-38, f μh of the dark side, remove the test strip and standard mercury bromide a color not deeper than standard.
7.2 分析步骤取25.0mL样品浸泡液,移入测砷瓶中,加5mL盐酸、5mL碘化钾溶液及5滴酸性氯化亚锡溶液,摇匀后放置10min,加2g无砷金属锌,立即将已装好乙酸铅棉花及溴化汞试纸的测砷管装上,放置于25~30℃的暗处1h,取出溴化汞试纸和标准比较,其色斑不得深于标准。
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Its something thats often done with ladies clothes, to put little weights in the hem, but its highly unusual for gentlemens outfits, Asos tailor Seiichiro Moriwaki said in a telephone interview.
麻生的裁缝森胁清一郎在一次电话采访中说:&在衣边加铅坠的方法常用于女装,但在男装中却很少见。&
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Mucilages ):粘液
4.粘液:(Mucilages)多存在于植物的粘液细胞内,是一种正常的生理产物. 其化学组成与树胶相似. 提取所得的粘液质多为无定形固体,在热水中可膨胀形成胶体溶液,不溶于有机溶剂. 可与醋酸铅溶液产生沉淀,在粘液的水溶液中加乙醇可使之沉淀析出,