• 介紹：

     本標(biāo)準(zhǔn)物質(zhì)主要用于測量儀器校準(zhǔn),分析方法評價和質(zhì)量控制,以及藥品、食品等相關(guān)領(lǐng)域相應(yīng)成分含量測定。

   

  一、樣品制備

  本標(biāo)準(zhǔn)物質(zhì)候選物是通過定制相應(yīng)阿魏酸純品，采用重結(jié)晶、柱層析等方法進(jìn)一步純化后制得，經(jīng)化學(xué)結(jié)構(gòu)定性分析和初步理化分析滿足要求后，進(jìn)行干燥分裝。

  阿魏酸：CAS號 537-98-4

   

   

  二、溯源性及定值方法

  經(jīng)方法確認(rèn)研究，本標(biāo)準(zhǔn)物質(zhì)采用高效液相色譜法-二極管陣列檢測器(HPLC-DAD)和定量核磁兩種不同原理方法定值方式測定候選物質(zhì)純度。通過使用滿足計量學(xué)特性要求的制備方法,測量方法和計量器具,保證標(biāo)準(zhǔn)物質(zhì)的量值溯源性。

   

   

  三、特性量值及不確定度（不同批次略有差別，詳見證書）

  編號	名稱	標(biāo)準(zhǔn)值（%）	不確定度（%）(k=2)
  BW10001	阿魏酸	99.93	0.02

  標(biāo)準(zhǔn)值的不確定度綜合考慮了主體純度定值結(jié)果、均勻性、穩(wěn)定性等引入的不確定度分量。

   

   

  四、均勻性檢驗及穩(wěn)定性考察

  參照國家標(biāo)準(zhǔn)JJG 1006-94《一級標(biāo)準(zhǔn)物質(zhì)技術(shù)規(guī)范》，隨機抽取分裝后的樣品，采用高效液相色譜法-二極陣列檢測器(HPLC-DAD)對候選物進(jìn)行均勻性檢驗、穩(wěn)定性考察，檢驗結(jié)果表明均勻性和穩(wěn)定性良好。

  本標(biāo)準(zhǔn)物質(zhì)最小取樣量為5mg。

  本標(biāo)準(zhǔn)物質(zhì)有效期2年，研制單位將繼續(xù)監(jiān)測該標(biāo)準(zhǔn)物質(zhì)的穩(wěn)定性，有效期內(nèi)如發(fā)現(xiàn)量值變化，將及時通知用戶。

   

   

  五、包裝、運輸和貯存、使用及注意事項

  1.包裝: 本標(biāo)準(zhǔn)物質(zhì)采用硼硅酸鹽玻璃安瓿瓶包裝，每瓶不少于50mg。

  2.運輸和貯存: 冰袋運輸,運輸時應(yīng)避免擠壓,碰撞；冷藏條件下貯存。

  3.使用: 標(biāo)準(zhǔn)物質(zhì)開封后，應(yīng)盡快使用；二次使用不能再做標(biāo)準(zhǔn)物質(zhì)使用。

   

   

  聲明

  1.本標(biāo)準(zhǔn)物質(zhì)僅供實驗室研究與分析測試工作使用。因用戶使用或存儲不當(dāng)所引起的投訴，不予承擔(dān)責(zé)任。

  2.收到后請立即核對品種、數(shù)量和包裝，相關(guān)賠償只限于標(biāo)準(zhǔn)物質(zhì)本身，不涉及其他任何損失。

  3.僅對加蓋“上海源葉生物質(zhì)檢專用章”的完整證書負(fù)責(zé)。請妥善保管此證書。

  4.如需獲得更多與使用有關(guān)的信息，請與技術(shù)部門聯(lián)系。

   

• 儲存條件： 2-8℃

• 注意：部分產(chǎn)品我司僅能提供部分信息，我司不保證所提供信息的權(quán)威性，僅供客戶參考交流研究之用。

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輸入產(chǎn)品批號：

本計算器可幫助您計算出特定溶液中溶質(zhì)的質(zhì)量、溶液濃度和體積之間的關(guān)系，公式為：

質(zhì)量 (mg) = 濃度 (mM) x 體積 (mL) x 分子摩爾量 (g/mol)

• pg ng μg mg g kg =
  fM pM nM μM mM M *
  nL μL mL L *