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當(dāng)前位置:首頁新聞中心紅外粉末壓片機使用注意事項:安全、精度與效率兼顧

紅外粉末壓片機使用注意事項:安全、精度與效率兼顧

更新時間:2025-09-01點擊次數(shù):3
  紅外粉末壓片機是紅外光譜分析中樣品制備的關(guān)鍵設(shè)備,其操作規(guī)范性直接影響壓片質(zhì)量、實驗數(shù)據(jù)可靠性及實驗室安全。為兼顧??安全防護、制樣精度與操作效率??,使用時需重點關(guān)注以下事項:
 
  一、安全為先:規(guī)范操作規(guī)避風(fēng)險
 
  安全是壓片機使用的基礎(chǔ)。首先,??設(shè)備運行前需檢查模具與壓桿的完整性??,確保無裂紋、變形或松動(尤其是高壓環(huán)境下,破損模具可能導(dǎo)致碎片飛濺傷人);操作時需佩戴??防護手套與護目鏡??,防止手部被夾傷或粉末顆粒濺入眼睛。其次,??嚴禁超壓使用??——不同型號壓片機有額定壓力限制(如常見10~30噸),需嚴格按說明書設(shè)定壓力值,超壓可能引發(fā)液壓系統(tǒng)故障、模具爆裂甚至設(shè)備損壞。此外,壓片完成后需等待壓力釋放(通常指示燈提示或手動泄壓至零位),再取出樣品,避免殘余壓力導(dǎo)致模具彈出傷人。
 

 

  二、精度保障:細節(jié)控制提升制樣質(zhì)量
 
  制樣精度直接影響紅外光譜數(shù)據(jù)的準(zhǔn)確性。一是??樣品與輔料的均勻混合??:紅外檢測通常需添加溴化鉀(KBr)等稀釋劑(比例約1:100至1:200),需通過瑪瑙研缽充分研磨至無顆粒感(粒度<2μm),混合不均會導(dǎo)致光譜基線漂移或吸收峰異常。二是??模具的清潔與干燥??:使用前需用無水乙醇擦拭模具內(nèi)壁,避免殘留粉末污染新樣品;若檢測吸濕性物質(zhì)(如某些有機鹽),需在干燥環(huán)境(如手套箱)中操作,防止水分混入影響峰形。三是??壓力與保壓時間的匹配??:根據(jù)樣品性質(zhì)調(diào)整壓力(如脆性樣品用較低壓力,黏性樣品適當(dāng)增壓),并保持穩(wěn)定保壓時間(通常1~3分鐘),避免過快卸壓導(dǎo)致片劑松散或密度不均。
 
  三、效率優(yōu)化:規(guī)范流程縮短時間成本
 
  高效操作需建立標(biāo)準(zhǔn)化流程。首先,??提前預(yù)熱設(shè)備??(部分液壓機型需空載運行1~2次),確保液壓系統(tǒng)壓力穩(wěn)定,減少首片因系統(tǒng)未穩(wěn)定導(dǎo)致的廢片。其次,??模具預(yù)處理??:新模具或長時間未用的模具,需先用少量KBr壓片“開模”,去除表面雜質(zhì)并潤滑內(nèi)壁,提升后續(xù)壓片的成功率。最后,??批量處理時做好標(biāo)記??:按樣品順序編號并記錄壓力、時間等參數(shù),避免混淆;連續(xù)壓片時,每10~15片需清潔模具一次,防止交叉污染影響后續(xù)樣品純度。
 
        紅外粉末壓片機的規(guī)范使用需以安全為底線、精度為核心、效率為輔助。通過嚴格操作防護、精細控制制樣參數(shù)及優(yōu)化流程管理,既能避免安全事故,又能獲得高質(zhì)量的紅外檢測樣品,最終保障實驗數(shù)據(jù)的準(zhǔn)確性與科研效率。
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