正庚烷_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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正庚烷

BW901020

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142-82-5

1mL

秦境

99.0%

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正庚烷介紹：

Reference Material

This certificate is designed in accordance with ISO17034 and ISO Guide 31. This reference material (RM) was designed,produced andverified in accordance with ISO/IEC 17025, ISO 17034 and a registered qualitymanagement system ISO9001.

Product Name	n-Heptane
Product Code	BW901020
Lot Number	23041519
CAS No.	142-82-5
Mol. Formula	C₇H₁₆
Mol. Weight	100.20
Certified on	14 Apr 2023
Expiry Date	13 Apr 2025
Storage Temp	(0~4)°C
Specification	1 mL

CERTIFIED

Purity

CERTIFIED

Expanded Uncertainty (U)

Approved by

99.0%

0.5%

Uncertainty

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

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

Intended Use

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

Safety

Proper precautions should be observed whilehandling. See Safety Data Sheet.

Traceability

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

Homogeneity

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

Storage

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

Instructions for use

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

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本公司銷售的所有產(chǎn)品僅供實(shí)驗(yàn)科研使用，不用于人體及臨床診斷。

國家標(biāo)準(zhǔn)1: GB/T 1884-2000《石油和液體石油產(chǎn)品密度測定法》

適用范圍	適用于液體石油產(chǎn)品（包括正庚烷）在實(shí)驗(yàn)室條件下的密度測定，適用于透明、低黏度液體的密度計(jì)算。
核心檢測方法	采用密度計(jì)法，在恒溫條件下（通常為20℃）將樣品注入量筒，插入密度計(jì)讀取密度值，結(jié)合溫度修正系數(shù)計(jì)算最終結(jié)果。
檢出限與定量限	本標(biāo)準(zhǔn)不涉及化學(xué)分析，檢出限與定量限不適用，密度測量精度可達(dá)0.0001 g/cm3。
質(zhì)控樣品要求	需使用經(jīng)認(rèn)證的標(biāo)準(zhǔn)物質(zhì)（如高純度正庚烷）進(jìn)行儀器校準(zhǔn)，確保測量環(huán)境恒溫且無振動(dòng)干擾。
關(guān)鍵實(shí)驗(yàn)步驟	1. 樣品恒溫至20℃； 2. 注入清潔量筒至80%體積； 3. 插入密度計(jì)并穩(wěn)定后讀數(shù)； 4. 記錄溫度并修正數(shù)據(jù)。
特別說明	實(shí)驗(yàn)需在無風(fēng)環(huán)境下進(jìn)行，防止密度計(jì)偏移；正庚烷易揮發(fā)，操作需快速且密封保存樣品。

行業(yè)標(biāo)準(zhǔn)1: SH/T 0246-1992《溶劑油芳烴含量測定法》

適用范圍	適用于含正庚烷的溶劑油中芳烴含量的測定，通過色譜分析分離正庚烷與其他烴類組分。
核心檢測方法	氣相色譜法（GC），使用非極性色譜柱（如SE-30）分離樣品中的烷烴、芳烴，通過面積歸一化法計(jì)算含量。
檢出限與定量限	芳烴組分檢出限為0.01%（質(zhì)量分?jǐn)?shù)），定量限為0.05%；正庚烷作為溶劑基質(zhì)時(shí)需扣除背景干擾。
質(zhì)控樣品要求	每批次檢測需包含空白樣品（純正庚烷）及已知濃度的芳烴標(biāo)準(zhǔn)溶液進(jìn)行校準(zhǔn)曲線驗(yàn)證。
關(guān)鍵實(shí)驗(yàn)步驟	1. 樣品稀釋至適宜濃度； 2. 設(shè)定色譜柱溫箱程序（初始50℃，升溫至280℃）； 3. 進(jìn)樣并采集數(shù)據(jù)； 4. 峰面積積分與結(jié)果計(jì)算。
特別說明	正庚烷純度需≥99%，避免雜質(zhì)峰干擾；實(shí)驗(yàn)結(jié)束后需高溫老化色譜柱以去除殘留組分。

國家標(biāo)準(zhǔn)2: GB/T 7534-2020《工業(yè)用揮發(fā)性有機(jī)液體沸程的測定》

適用范圍	用于測定正庚烷等揮發(fā)性有機(jī)液體的初餾點(diǎn)、干點(diǎn)及沸程范圍，評(píng)估其純度及揮發(fā)性。
核心檢測方法	蒸餾法，使用標(biāo)準(zhǔn)蒸餾裝置加熱樣品，記錄第一滴餾出物（初餾點(diǎn)）和最終殘留液溫度（干點(diǎn)）。
檢出限與定量限	溫度測量精度需達(dá)0.1℃，沸程范圍測定誤差不超過±1℃。
質(zhì)控樣品要求	使用已知沸程的正庚烷標(biāo)準(zhǔn)品（如沸點(diǎn)98-100℃）驗(yàn)證設(shè)備準(zhǔn)確性，每10次實(shí)驗(yàn)校準(zhǔn)一次。
關(guān)鍵實(shí)驗(yàn)步驟	1. 裝置氣密性檢查； 2. 樣品量取100mL； 3. 控制加熱速率（4-5mL/min）； 4. 記錄溫度并繪制蒸餾曲線。
特別說明	正庚烷易燃，需遠(yuǎn)離明火；蒸餾殘?jiān)璋次ｋU(xiǎn)廢物處理，避免環(huán)境污染。

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