banyak para ahli dan masyarakat kita bertanya:
- andai bukan jessica pelakunya, apa mungkin sianida bisa ada sendiri dalam kopi. tidak masuk diakal itu!!!!!
- andai sianida sudah ada dalam kopi sebelum disediakan ke pemesan, bisa semua yang minum kopi saat itu bisa terpapar sianida.
2 point diatas bisa saja terjadi, mungkin hantu. wong orang kito sukanya tahyul. wkwkwkwk
saya coba jelaskan 2 point di atas, krn banyaknya masyarakat khusus hari ini yang bertanya soal itu dan ini juga sudah ada dalam benak masyarakat kita sejak bergulir kasus ini
vietnam coffee masuk kategory coffee beans yang artinya jika seorang memesan coffee vietnam maka baristanya mulai melakukan dari tahap awal penggilingan biji kopi/blender menjadi bubuk. nah klo sudah jadi bubuk terserah tata caranya dan diberikan merk/brand. dalam hal ini merk/brand vietnam coffee, es - susu - penyaring - kopi baru dituangkan air panas semua dilakukan didepan pemesan.
'In cases of unknown poisoning, forensic toxicologists are required to elucidate the cause of death, and one of the most noticeable poisons is cyanide. We report on the artifactual production of cyanide from coffee and tea drinks in the presence of nitrite, which is frequently adulterated to lead to the fault result in drug testing.
Methods:
Cyanide was measured by head-space gas chromatography using porous polymer capillary GS-Q column and a nitrogen-phosphorus detector. Samples were mixed with sodium nitrite in a glass vial under acidic conditions of 10% phosphoric acid or 0.6 M sodium phosphate buffer (pH 5.0). After incubation for 30 min at 50 â—¦C, the resulting head-space was injected into the gas chromatograph.
Hydrogen cyanide(HCN) was eluted at 2.2 min, and the peak area was converted for measuring cyanide concentration in the liquid reaction mixture. From the 50 ◦C incubation mixture of commercial coffee drink (or tea drink) and nitrite (50 mM), several µg/mL and sub-µg/mL of cyanide was produced in the presence of 10% phosphoric acid and pH 5.0 buffer, respectively.
Cyanide was also produced from the reaction mixture of nitrite and polyphenol compounds such as chlorogenic acid and catechins, which are included in coffee and tea drinks, but not from a monophenol mixture.
