謝謝各位了，現在我知道有3個可能會出現該問題的原因了，還待供方來廠再證實一下。
----- Original Message -----
From: Ziyi Li
To: [log in to unmask]
Sent: Thursday, January 03, 2008 8:37 AM
Subject: [TGA] 答复: Re: [TGA] RoHS管制+6价的Cr，为何是离子 态的管制？
Hi Benjamin：
可以用反正法验证你的观点，好似难以成立！
即：
假设你的观点成立，那氰化物是否同样有存在残留的可能？答案也是会存在！如此它的毒性比6价的铬要高呢~所以我们的假设还是不能成立！
期望各位给予比较合理的解释！
谢谢！
Best Regards
************************************************
支架事业处 工程&品管 课长 李子祎
扬州华夏集成光电有限公司
地址：江苏扬州经济开发区扬子江南路518号(邮编：225009)
网址：http://www.darewinchip.com
邮箱：[log in to unmask]
电话：0514-87849588ext:8086
传真：0514-87849312
Skype:liziyi_jhks
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[log in to unmask]
2008-01-03 08:08
收件人 Asia Committe Task Group Forum <[log in to unmask]>, [log in to unmask]
抄送 [log in to unmask]
主题 Re: [TGA] RoHS管制+6价的Cr，为何是离子态的管制？
Hi Ziyi,
As the supplementary information for other's answers.
It is because the Cr6+ is more toxic than Cr or Cr3+, but its existence in nature is by chemical compound in solid state with other ions or ionic groups. The analysis is to measure how much of chromium existed as the state of Cr6+ in the chemical compounds of the product. Though existed in chemical compound state (solid), when inhaled or other ways into human bodies, it will be then decomposed into Cr6+ in human body (as the salt dissolved in blood or water) to cause toxic reaction. How we verify the existence of Cr6+ is usually by X-Ray Fluorescence (nondestructive), UV-Visible Spectroscopy (destructive) quantitatively, or other known chemical reactions quantitatively or qualitatively.
Hope this helps, and please feel free to let me know if any further information necessary, thank you very much!!
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Benjamin Chen
Regional Technical Coordinator, Asia-Pacific
Consulting and Training
Underwriters Laboratories Taiwan Co., Ltd.
Tel: 886-2-2896-7790 ext. 62267, Fax: 886-2-2896-6140
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Ziyi Li <[log in to unmask]>
Sent by: TGAsia <[log in to unmask]>
01/02/2008 04:59 PM
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Subject [TGA] RoHS管制+6价的Cr，为何是离子态的管制？
Dear All：
为什么RoHS管制+6价的Cr?在我认为：固态的产品（电镀层）如何出现离子态，很另人困惑~,恳请各位支招!
谢谢!
Best Regards
************************************************
支架事业处 工程&品管 课长 李子祎
扬州华夏集成光电有限公司
地址：江苏扬州经济开发区扬子江南路518号(邮编：225009)
网址：http://www.darewinchip.com
邮箱：[log in to unmask]
电话：0514-87849588ext:8086
传真：0514-87849312
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