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四氫呋喃_
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四氫呋喃

BW901110 {{goodObj.price > 0 ? '￥' + goodObj.price : '咨詢'}} ￥{{goodObj.sell_price || 0}} 咨詢 1g {{goodObj.date}} 秦境 {{item.norm}} 99.6% {{inventory}}
四氫呋喃介紹：

REFERENCE MATERIAL CERTIFICATE

Reference Material

This certificate is designed in accordance with ISO 17034 and ISO Guide 31. This reference material (RM) was designed,produced and verified in accordance with ISO/IEC 17025, ISO 17034 and a registered quality management system ISO9001.

Product Name

Custom-Tetrahydrofuran

Product Code

BW901110

Lot Number

23091516

CAS No.

109-99-9

Mol. Formula

C4H8O

Mol. Weight

72.11

Certified on

13 Sep 2023

Expiry Date

12 Sep 2026

Storage Temp

20°C ± 4°C

Specification

1g

CERTIFIED

Purity

CERTIFIED

Expanded Uncertainty (U)

Approved by

99.6%

1.0%

Uncertainty

The certified value(s) and uncertainty(ies) are determined in accordance with ISO 17034 with an 95% confidence level (k=2). Uncertainty is based on the Total Combined Uncertainty, including uncertainties of characterisation, homogeneity and stability testing. Stability values are based on real evidence opposed to simulation.

The producer certifies that this reference material meets the specification stated in this certificate until the expiry date, provided it is stored unopened at the recommended temperature herein. Product warranties for this reference material are set out in the terms and conditions of purchase.

Intended Use

This RM is intended for use in a laboratory as a calibration and quality control standard or in method development for analytical techniques.

Safety

Proper precautions should be observed while handling. See Safety Data Sheet.

Traceability

The balances used for gravimetric measurements are calibrated with weights traceable to the national standards (DKD). The calibration of the balances is verified daily internally and annually by an external accredited calibration service. Chromatographic methods are traceable to the International System of Units (SI).

Homogeneity

Random replicate samples of the final packaged RM have been analysed to prove homogeneity compliant with ISO 17034.

Storage

The RM should be stored in the original sealed container at the indicated temperature.

Instructions for use

It is recommended to use 1 mg as the minimum sample size and if less material is used, to increase the certified uncertainty by a factor of two for half sample and four for a quarter of sample. If storage after opening is necessary, the RM should be tightly closed and kept from light and moisture. If the RM was in a sealed ampoule, it should be transferred to a vial with minimum head space.


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國家標準：工作場所空氣有毒物質(zhì)測定 第48部分 四氫呋喃（GBZ/T 160.48-2007）
標準名稱及標準號 工作場所空氣有毒物質(zhì)測定 第48部分 四氫呋喃（GBZ/T 160.48-2007）
適用范圍 適用于工作場所空氣中四氫呋喃濃度的檢測，包括采樣、實驗室分析及質(zhì)量控制要求，涵蓋固定和個體采樣場景。
核心檢測方法 溶劑解吸-氣相色譜法：活性炭管采集樣品，經(jīng)二硫化碳解吸后，使用氣相色譜儀（FID檢測器）進行定量分析。
檢出限與定量限 檢出限為0.5 μg/mL，定量限為1.5 μg/mL（以解吸液體積1 mL計）。
質(zhì)控樣品要求 1. 校準曲線相關系數(shù)≥0.999；
2. 每批次樣品需包含空白對照及平行樣（相對偏差≤10%）；
3. 回收率應控制在85%-110%。
關鍵實驗步驟 1. 采樣流量100 mL/min，時間15分鐘；
2. 解吸液體積1.0 mL，震蕩解吸30分鐘；
3. 色譜條件：毛細管柱（HP-5），柱溫80℃（3分鐘）-20℃/min升溫至200℃；
4. 定量方法：外標法定量。
特別說明 1. 四氫呋喃易揮發(fā)，解吸過程需密閉操作；
2. 活性炭管采樣前后需密封避光保存（≤4℃冷藏）；
3. 實驗中需佩戴防護手套，避免皮膚直接接觸解吸液（二硫化碳）。
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以上信息僅供參考，請以相應標準的原文為準！
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