问题：化学人名反应;贝尔思坦反应
类型：求助 (悬赏分:3分)
提问：hyk0421
等级：▲
版块：有机化学问题(jimuwei,fpcwin1211,netpanda,yjgzfl,Ftian,)
信誉：48%
回复：3
阅读：737
时间：2006-04-03 17:02:18 编辑加入/取消收藏订制/取消短消息举报该贴

贝尔思坦反应具体内容是什么我想知道，不知那位大虾能否告诉一下

回复人：tangyyer,★★★★★ (有空来逛逛my blog: http://tangyyer.blog.hexun.com) 时间：2006-04-03 18:12:45 编辑

1楼

This test describes a general procedure for the detection of chlorine in soft plastic children's products. The test can be used to screen consumer products for the possibility of a material being made of polyvinyl chloride (PVC).
REAGENTS AND APPARATUS
Bunsen burner.
Copper wire (15 cm of a stripped heavy gauge wire) installed in a center of a cork stopper.
Detergent free scrubbing pad (stainless steel is preferred) to clean the copper wire as needed.
EXPERIMENTAL PROCEDURE
Heat one end of the copper wire in a Bunsen burner flame until all surface contaminants
have been burned off and that the wire becomes red hot.
Bring the red hot end of the copper wire against the product sample until a burn is produced on the surface of the material being tested, then bring the wire back into the upper part of the Bunsen burner flame.
Observe the flame for a change in colour. Once the organic compounds are burned, a distinctive green / blue-green colour indicates the presence of chlorine.
RESULTS
A positive result (green flame) indicates that the plastic material tested contains chlorine and is possibly polyvinyl chloride. Other than PVC, there are few plastic materials which contain chlorine that are commonly used in soft plastic children's products1.
A negative result (the flame does not turn green) indicates that the material tested cannot be PVC.

Some halogen free compounds such as pyridine and quinoline derivatives, purines, acid amides and cyano compounds decompose in the flame to produce cyanides which also give a blue-green flame. This test is therefore not entirely specific for halogens.

回复人：tangyyer,★★★★★ (有空来逛逛my blog: http://tangyyer.blog.hexun.com) 时间：2006-04-03 18:13:16 编辑	2楼
具体看看http://www.hc-sc.gc.ca/cps-spc/alt_formats/hecs-sesc/pdf/prod-test-essai/method/chem-chim/c-28_e.pdf

回复人：hyk0421,▲ () 时间：2006-04-04 09:51:46 编辑	3楼
楼上的，这个反应应该是个经典有机反应好像你说的不对

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