Page 26 - 2022_3月消防月刊0704

工作
探討
Work Discussion
儀 譜 質 鑑 場 火 析 熱 裂 運 用 解 層 析 氣 相 易 燃 中 殘 跡 性 研 究 之 液 體

前言

ତʦҢ਷˦Өᛠ֛ྼ᜕܃ᛠؓ˦ఙಞ༦ᗇيʘۃஈଣ˙جdεᅰમ͜ ASTM
E1412 ᎑࿒ό௟٤ዢᐵʱؓجd༈ۃஈଣ˙جცਗ਼іڝኒ€ݺ׌၁˪Դ͜๓ኒ

୭ڝfމઞӺՉ˼ڢԴ͜๓ኒʘ୭ڝ˙όd͉҅࠯௴Ꮠ͜ᆠ൓༆ᄃ€Pyrolyzer
ਗ਼ݺ׌၁˪ආБ̋ᆠ୭ڝdԨஹટं޴ᄴؓሯᗅᄃ€GC/MSආᅵʱؓd০࿁ͦ
ۃ̹ࠦ੬Ԉڮዷኒϓʱd˸฽׌eڢ฽׌iॱيሯe૿ΥيiჀሯeʕሯeࠠሯ
ഃʔΝ၇ᗳʘ׸ዷ׌૰᜗ʱᗳਂᛠؓઞীfΪ͉௴อ˙جમ͜ʘ୭ڝዚՓڷԴ͜
̋ᆠ୭ڝdՉᎴᓃމˡ඲ᕘ̮Դ͜๓ኒ୭ڝd߰Ϥج຾᜕ᗇ̙Бd׵ྼਕʈЪɪ
̙ЪމႾп᜕ᗇʘਞϽf

At present, the pre-treatment most commonly used by fire research laboratories in
Taiwan for accrediting evidence from scenes of fire is ASTM E1412, an analytical
technique employing passive headspace concentration. This pre-treatment involves
the use of a solvent to carry out desorption on activated charcoal strips, an adsorbent.
In order to explore other desorption methods that do not involve the use of solvents,
the National Fire Agency (NFA) has pioneered the application of the pyrolyzer to heat
and desorb activated carbon strips. Gas chromatography and mass spectrometry (GC/
MS) are then used to analyze the sample. Common accelerants are then classified into
different flammable liquid categories, such as polarity (polarity/dipolarity), purity (pure
substances/mixtures), and weight (light/medium/heavy) for analysis. The advantage of
this new technique lies in the use of heat to carry out desorption, which makes it possible
to avoid the use of additional solvents for this purpose. If this method is proven to be
feasible in practice, it can then be a supplementary analytical option on site.

▎研究方法
͉޼Ӻ˴ࠅਞમ ASTM E1412 ݴ೻ݖ࿴ආБᅵۜʘۃஈଣdԨᜊһ
Չ๓ኒ୭ڝӉ᜷dҷ˸ᆠ൓༆ᄃ̋ᆠආБᆠ୭ڝdΎஹટं޴ᄴؓሯᗅ
ᄃʱؓfϤ̮d͉޼Ӻ͵ணࠇʔΝᆠ୭ڝ๝ܓʿε၇׸ዷ׌૰᜗d˸ী
ઞՉᅂᚤΪɿʿ̙Б׌f޴ᗫᄃኜண֛ਞᅰ༉νɨڌj
圖

文：臺北市政府消防局 ˙ ᄃኜண֛ਞᅰɓᚎڌ
ᛠ֛˙ج ᅺ๟˙ج ௴อ˙ج

ਞᅰධͦ ं޴ᄴؓሯᗅᄃண֛ૢ΁ ᆠ൓༆ं޴ᄴؓሯᗅᄃண֛ૢ΁
๓ኒ୭ڝ ᆠ୭ڝ
๓ኒ၇ᗳ ͍́Ὦ ڋ๝ 50Ċ
୭ڝ˙ό
๓ኒඎ 0.5ml ๝ʺ஺ଟ 200Ċ /min
୭ڝࣛග 15min ͋๝ 300Ċe400Ċe500Ċ
ᅵۜءɝඎ 1DŽl 0.3mg
鄭楷譯
注入分流比 1：20 1：20
注射埠溫度 250℃ 250℃
林如瑩
初溫 40℃ 40℃
升溫速率 10℃ /min 10℃ /min
謝佩臻 末溫 270℃ 270℃
離子源 電子電離法 電子電離法
掃描方式 總離子掃描 總離子掃描
Application of Pyrolysis-Gas Chromatography-Mass Spectrometry for Analyzing Ignitable Liquid Residues from Fire Debris
質譜範圍 35-450amu 35-450amu

︱第 03 期 2022 March ︱ 26