聯(lián)苯_單標(biāo)_有機(jī)類_標(biāo)準(zhǔn)物質(zhì)_萘析商城_實(shí)驗(yàn)室科技服務(wù)創(chuàng)新平臺(tái)

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聯(lián)苯

BW901063

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92-52-4

100mg

秦境

99.9%

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聯(lián)苯介紹：

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	Biphenyl
Product Code	BW901063
Lot Number	25041519
CAS No.	92-52-4
Mol. Formula	C₁₂H₁₀
Mol. Weight	154.21
Certified on	21 Apr. 2025
Expiry Date	20 Apr. 2030
Storage Temp	20°C ± 3°C
Specification	100 mg

CERTIFIED

Purity

CERTIFIED

Expanded Uncertainty (U)

Approved by

99.9%

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 external7 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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標(biāo)準(zhǔn)名稱及標(biāo)準(zhǔn)號(hào)

GB/T 18883-2002《室內(nèi)空氣質(zhì)量標(biāo)準(zhǔn)》

適用范圍

該標(biāo)準(zhǔn)規(guī)定了室內(nèi)空氣中總揮發(fā)性有機(jī)物（TVOC）的檢測(cè)方法，包括聯(lián)苯等揮發(fā)性有機(jī)物的定量分析，適用于住宅、辦公場(chǎng)所等室內(nèi)環(huán)境的空氣質(zhì)量評(píng)估。

核心檢測(cè)方法

采用氣相色譜-質(zhì)譜聯(lián)用法（GC-MS），通過吸附管采樣、熱脫附后進(jìn)樣分析，聯(lián)苯的分離和定量依據(jù)保留時(shí)間及特征離子峰面積比。

檢出限與定量限

聯(lián)苯的檢出限（LOD）為0.02 μg/m3，定量限（LOQ）為0.08 μg/m3，基于標(biāo)準(zhǔn)曲線法和信噪比（S/N≥3）確定。

質(zhì)控樣品要求

每批次樣品需包含空白對(duì)照、平行樣和加標(biāo)回收樣。加標(biāo)回收率應(yīng)在80%-120%，平行樣相對(duì)偏差≤15%。

關(guān)鍵實(shí)驗(yàn)步驟

1. 樣品采集：使用Tenax-TA吸附管，以0.5 L/min流速采樣10 L空氣；
2. 熱脫附：脫附溫度300℃，載氣流量40 mL/min；
3. 儀器分析：色譜柱為HP-5MS，程序升溫（40℃起始，5℃/min升至200℃）；質(zhì)譜采用SIM模式監(jiān)測(cè)聯(lián)苯特征離子（m/z 154、152）。

特別說明

1. 實(shí)驗(yàn)過程中需避免吸附管受污染，采樣前后需密封保存；
2. 聯(lián)苯標(biāo)準(zhǔn)曲線需覆蓋樣品濃度范圍，相關(guān)系數(shù)（R2）≥0.995；
3. 若樣品中聯(lián)苯濃度超出曲線范圍，需稀釋后重新分析。

以上信息僅供參考，請(qǐng)以相應(yīng)標(biāo)準(zhǔn)的原文為準(zhǔn)！