Re: [問題] 關於檢驗血液的存在
※ 引述《tonyshi (xxxx)》之銘言：
: 關於CSI中 每次都會先用棉花棒沾不明東西
: 然後滴ㄧ種液體,若是血液的話就會有粉紅色或是紅色的產生
: 那種液體 應該是酚太(那個字打不出來)吧
: 可是酚太不是碰到鹼性就會變紅色嗎
: 那樣的話 碰到的不是血液 也變紅色 那怎麼辦
: 謝謝
Phenolphthalein is used to perform a presumptive blood test, and is commonly
known as the Kastle-Meyer test. A dry sample is collected with a swab or
filter paper. First a few drops of alcohol, then a few drops of phenolphthalein
and finally a few drops of hydrogen peroxide are dripped onto the sample. If
the sample turns pink then it is a positive test. This test is nondestructive
to the sample; it can be kept and used in further tests at the lab. This test
has the same reaction with blood from any animal, so further testing would be
required to determine whether it originates from a human.
reference: wiki
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