【starch_indicator】什么意思_英语starch_indicator的翻译_音标_读音_用法_例句_在线翻译

starch indicator

[试剂] 淀粉指示剂

5、淀粉指示剂(Starch indicator)：0.2%。 (二) 方法 1、秤取绝干1g 未漂纸浆加水500mL 或少于500mL 蒸馏水，于2L 容积烧杯中，利用搅拌机充分予以分离纤维。

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abstract: Starch is often used in chemistry as an indicator for redox titrations where triiodide is present. Starch forms a very dark blue-black complex with triiodide which can be made by mixing iodine with iodide (often from potassium iodide).

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Conceal disturbing elements like iron, copper, lead with hydrogen fluoride amine-EDTA, add the potassium iodide to separate iodine, and take starch as indicator, titrate with sodium hyposulfite.

试样以王水分解、泡塑富集分离金，硫脲解脱，以硝酸-硫酸破坏硫脲，用氟化氢胺- EDTA掩蔽铁、铜、铅等干扰元素，加碘化钾使之析出碘，以淀粉为指示剂，用硫代硫酸钠进行滴定。

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