抱歉小弟對化學一竅不通問個白癡問題...
碘酸鉀是不是就是碘化鉀呢?
好像很多碘添加劑的主要成份都是這個,
現在大家用的碘測試劑好像有兩個牌子(Salifert & Seachem)
我自己只有用過 Seachem 的,
這個牌子只能夠測出 iodine 和 iodide,
因此常常只有在剛添加後才能測出數據,
這是因為這兩個成份並不穩定很快就會轉換成別種形態的碘(iodate),
Salifert 碘測試劑則號稱能測出所有形態的碘,
引述一段其英文介紹如下
*Iodine is present in natural sea water in a very low concentration (0.6 mg/L or 0.06 PPM) and
this iodine occurs as several different species including iodide, iodate, molecular iodine and hypoiodite.
*There is a misconception among many hobbyists that iodide predominates in natural sea water but in fact,
it is iodate which is the predominant element.
*Test kits which are not capable of detecting iodate are not suitable for aquarium use, since in a properly
functioning tank most of the iodide will be transferred to iodate and any test kits not able to detect iodate
will give a false, low iodine reading.
*Iodine test kits should be capable of measuring all forms of naturally occurring iodine. The Salifert Test Kit
is the only one offering this feature, measuring all naturally occurring iodine compounds and giving a
reading of total iodine concentration.
*Unlike many other test kits, the Salifert Iodine Profi-Test is free from interference from other elements
found in saltwater, which means the results obtained are very accurate.
*Color remains stable for several hours.
*Scale goes from 0.01 - 0.15ppm and optimum level is 0.06 mg/L.
有使用過 Salifert 碘測試劑的大大曾經告訴小弟碘含量不會減少,
我想這也可能是一個原因,
而碘的含量應該是多少我到現在還搞不清楚.....
引述一段某牌子碘添加劑的介紹詞
*Natural seawater contains an average iodine concentration of about 60 mg/l (including all
detectable iodine compounds).
*This corresponds to a rough ”standard value” for natural seawater not exposed to any
reef influences.
*In reef areas close to the coast, the iodine values are considerably higher. On the coast as
well as in reef zones, these values are substantially higher due to the decomposition of
algae and the release of the iodine concentrations accumulated in them.
*For this reason, the iodine concentration in the ocean is distinctly lower then in ocean reef zones.
其實那種測試劑比較好小弟不敢妄下評論,
因為小弟自己並沒有用過 Salifert 的碘測試劑來監測缸子碘含量的變化,
只有片面由其它使用過的大大口中得知測試結果罷了.....
.....希望有大大願意分享監測結果!!
另一個原因是到底那種形態的碘才能被生物所吸收利用小弟並不知道,
...........也希望知道的大大能幫小弟解惑,
如果生物能吸收所有形態的碘,
則 Seachem 碘試劑測出來的值將會過低,
反之如果生物只能吸收某些不穩定形態的碘,
則使用 Salifert 測試劑將失去意義,
碘添加劑的成份也不一定只有碘化鉀,
引述一段某牌碘添加劑的介紹詞
XXX Iodine is an essential trace element for corals, higher algae and especially for crustaceans.
Iodine quickly oxidizes and gets unstable. Therefore XXX Iodine was developed as a three component
iodide additive, it releases its components sequentially for continuous assimilation by animals and plants:
iodide ions and elementary iodine are available immediately. Even after a couple of days the third
component provides long term stable organic iodine.
這就是號稱具有長效性的產品,
小弟手上有三種牌子的碘添加劑有的也號稱具有長效性,
但因為現有的還沒用完所以一直懶得測其效果,
待有機會再與大家分享比較結果
而 Minnow 大哥要用高純度的碘酸鉀來 DIY 我想應該是可以的,
不過安全性和經濟性恐怕就要好好研究一下了~
小弟的愚見也不一定正確大家參考就好!
