四氯化碳
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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
Tetrachloromethane
Product Code
BW901002
Lot Number
23041503
CAS No.
56-23-5
Mol. Formula
CCl4
Mol. Weight
153.82
Certified on
6 Apr 2023
Expiry Date
5 Apr 2025
Storage Temp
(0~4)°C
Specification
1.0mL
CERTIFIED
Purity
CERTIFIED
Expanded Uncertainty (U)
Approved by
96.6%
0.5%
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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手機(jī)版：四氯化碳
本公司銷售的所有產(chǎn)品僅供實驗科研使用，不用于人體及臨床診斷。
2. 消解程序：在120℃條件下消解30分鐘，冷卻后加入四氯化碳萃取干擾物質(zhì)；
3. 比色測定：使用10mm石英比色皿，扣除275nm處的背景干擾。
2. 當(dāng)水樣含有大量油脂或色度時，需增加四氯化碳萃取次數(shù)；
3. 標(biāo)準(zhǔn)物質(zhì)需使用國家認(rèn)證的氮標(biāo)準(zhǔn)溶液，臨用現(xiàn)配。
以上信息僅供參考，請以相應(yīng)標(biāo)準(zhǔn)的原文為準(zhǔn)！