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永寬化學電子報-第466期

已更新:2025年11月25日

實驗報告 § AT-710自動電位滴定儀

永寬化學導入一台AT-710自動電位滴定儀,以提升實驗室分析效率與準確度,例如應用於總酸價 (TAN)、總鹼價 (TBN)、環氧當量 (EEW)、羥值 (OH Value)及異氰酸酯基 (–NCO)含量等項目分析 (圖1)。AT-710 是利用電位滴定 (Potentiometric Titration)來進行分析。透過電極感測液體中離子濃度的變化,來判斷反應進行的程度。當逐步加入滴定液時,儀器會自動記錄電位與滴定量的變化,而當反應接近完成,電位會出現明顯的改變,系統則透過微分計算來精準判定當量點 (圖2藍色曲線)。以酸價測定為例,黃色曲線是pH值隨滴定劑體積變化的趨勢,當曲線出現彎折,同時對應藍色曲線的最高峰,則清楚表示反應剛好到達終點,即為當量點。系統會依據這些變化自動計算樣品濃度,讓分析過程快速又準確。我們邀請原廠技術人員到廠進行校正與操作訓練,課程內容包含電極維護、軟體設定、滴定液標定與異常判斷等實務操作 (圖3)。藉由這台儀器,實驗室的分析準確性與判讀能力,將持續朝向高精度與高效率的目標邁進。

─作者:李易真 小姐

關於永寬 § 三天兩夜的嘉明湖

司發起三天兩夜嘉明湖登山之旅,此路線具有挑戰性,僅對有登山經驗的同仁開放,本次共有12人參加。大夥在凌晨3點集合出發,為了安全,我們結伴同行。登山過程很累人,沿途經過向陽山與三叉山,每一步都考驗著毅力與體力。第三天,約莫走13 km終於抵達譽為「天使的眼淚」-嘉明湖。有人笑說:「中途一度想放棄,多虧有大家一路加油打氣,當我站在山頭回頭望,才發現原來自己也不簡單!」我們也鼓勵同仁參加戶外活動、親近自然。12月,將會舉辦「一日登兩百岳」活動,到時候再與您分享精彩的活動內容!

知識交流 § 熱固性高分子有剪切降伏的特徵嗎?


材料受應力的時候會有應變,當應力到達最大值之後隨即變小,應變繼續增加,代表分子鏈滑動,這種現象就叫剪切降伏。熱固性材料是網狀結構,在抗拉模式的時候分子鏈會斷裂產生空孔,形成裂縫因此破壞,所以看不到剪切降伏的特徵。一樣的材料在抗壓模式的實驗中,壓力會抑制空孔的發生,因此可以看到分子鏈滑動的特性,也就是會有剪切降伏的特徵。

雙週好球 § 興趣源自於生活

興趣往往源自於日常生活中的小細節。還記得在大學期間,我偶然迷上了觀看別人製作手帳的影片。看著他們將生活、工作或靈感,透過照片、貼紙與文字組合成一本本充滿故事的本子,我覺得非常有趣,也很想嘗試看看。於是當時的我,對於自己隱隱存在的藝術細胞有著過人的自信,也興致勃勃地投入其中,就開始用自己的方式去記下日常的生活碎片。

我習慣隨手按下相機快門,把大學裡的各種事情,用照片與文字拼貼起來。有時是與朋友聚餐,有時是某個犯傻時刻,也或許只是校園的點滴。透過這些片段,我逐漸建構出一本屬於自己的青春紀錄。我深知,如果不這樣留下痕跡,這些片刻將會隨著時間流逝而悄悄淡去。隨著時間累積,我的紀錄本很快地接近完成。當我一頁一頁翻閱時,彷彿又能回到那些當下,重新感受曾經的歡笑、努力與感動。對我來說,這不僅是一本書,更像是一個承載記憶的寶盒。或許在未來的某一天,當我年華漸長,再次翻開它時,依然能夠感受到那段青春歲月的溫度,並且提醒自己,生命中每個看似平凡的瞬間,其實都值得被珍藏。

─作者:張淳雅 小姐


25 則留言


Mell
20 小時前

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Mell
2 天前

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Mell
4 天前

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Mell
5 天前

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Mell
6 天前

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