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发帖数: 13081 | | d**********0
发帖数: 13081 | 2 政府的辟谣：
http://news.xinhuanet.com/fortune/2013-03/21/c_124486464.htm
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由于一直没有公布最终的调查结果，所以有很多传言，有人认为在饲料里加砒霜可以让
猪等毛皮的更加光亮。其实，砒霜是属于无机砷，它是一种剧毒物质，而我们能在饲料
里添加的是有机胂。有机胂跟无机砷是完全不同的两种物质。有机胂药物饲料添加剂对
于提高畜禽饲料利用率，增强抗病能力有着明显的作用。在1964年美国FDA允许有机胂
应用于饲料，在1983年正是批准其作为畜禽促生长增长剂，目前在世界多个国家畜禽养
殖业中它都被普遍应用。
由于有机胂含有促进血红蛋白合成，改善生猪皮肤营养功能，生猪摄入一定量的有机胂
之后在外观上会显得皮肤红润，毛发发亮，而这些并不是一些人误以为的生猪慢性中毒
。通过饲料添加剂进入动物肌体的有机胂基本是以原形从粪便排除，规范合理的使用不
会造成残留超标，截至目前没有足够的科学证据表明有机胂在动物体内环境中可能会转
换为无机砷，同时也没有足够的科学数据证明规范合理的使用有机胂饲料添加剂会带来
食品安全风险。 | d**********0
发帖数: 13081 | 3 wiki page 对 有机胂的解释：
http://encyclopedia2.thefreedictionary.com/Organoarsenic+Compou
Organoarsenic Compounds
organic compounds that contain an atom of arsenic directly bonded to a
carbon atom. The most important types of organoarsenic compounds that
contain trivalent arsenic are as follows. | d**********0
发帖数: 13081 | 4 http://en.wikipedia.org/wiki/Organoarsenic_chemistry
Organoarsenic chemistry
From Wikipedia, the free encyclopedia
Organoarsenic chemistry is the chemistry of compounds containing a chemical
bond between arsenic and carbon. A few organoarsenic compounds, also called
"organoarsenicals," are produced industrially with uses as insecticides,
herbicides, and fungicides. In general these applications are declining in
step with growing concerns about their impact on the environment and human
health. The parent compounds are arsine and arsenic acid. Despite their
toxicity, organoarsenic biomolecules are well known. | d**********0
发帖数: 13081 | 5 确实可以做食料添加
The monomethylated acid, methanearsonic acid (CH3AsO(OH)2), is a precursor
to fungicides (tradename Neoasozin) in the cultivation of rice and cotton.
Derivatives of phenylarsonic acid (C6H5AsO(OH)2) are used as feed additives
for livestock, including 4-hydroxy-3-nitrobenzenearsonic acid (3-NHPAA or
Roxarsone), ureidophenylarsonic acid, and p-arsanilic acid. These
applications are controversial as they introduce soluble forms of arsenic
into the environment. | d**********0
发帖数: 13081 | 6 这里讲到一些在珠江流域的研究。
http://www.sciencedirect.com/science/article/pii/S0026265X12002
Abstract
Organoarsenic compounds, such as roxarsone (3-nitro-4-hydroxyphenylarsonic
acid, ROX) and p-arsanilic acid (ASA), are widely used as animal feed
additives, while animal wastes bearing these compounds are often used to
fertilize agricultural land, which can cause arsenic pollution of soil,
surface water, and groundwater. Determination of a number of inorganic and
organic arsenic species in a variety of environmental matrices is necessary
to study the environmental fate of organoarsenic feed additives and to
assess their risk. A robust analytical method was developed in this work for
precise and accurate quantification of ROX, ASA, dimethyl arsenic acid (DMA
), monomethyl arsenic acid (MMA), arsenate [As(V)], and arsenite [As(III)]
by HPLC–ICP-MS with gradient elution. Extraction conditions for recovering
the inorganic and organic arsenic species from soils and sediments were also
optimized, and the best results were obtained with 0.5 mol·L− 1
H3PO4 under constant shaking for 16 h. This method was applied in
determining the levels of inorganic and organic arsenic species in sediments
, soils, and surface water surrounding several swine farms in the Pearl
River Delta in southern China and the results showed that the environmental
media were already impacted by organoarsenic feed additives. | m*********c
发帖数: 253 | 7 额。。。。。。本版是针对人的医疗实践，鉴于没有兽医版，建议到水世界或到化学版
讨论。暂不删贴，允许围观。 |
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