GB/T 16781.1-1997 in English

SUPERSEDED

Natural gas-Determination of mercury-Atomic absorption spectrometry

Issued on:1997-05-08
Implemented on:1997-10-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $190.00
$185.00

Standard No:	GB/T 16781.1-1997
Document status:	SUPERSEDED
Superseded by:	GB/T 16781.1-2008 Natural gas - Determination of mercury - Part 1: Sampling of mercury by chemisorption on iodine
Superseded on:	2009-06-01
Title in English:	Natural gas-Determination of mercury-Atomic absorption spectrometry
Title in Chinese:	天然气中汞含量的测定原子吸收光谱法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	1997-05-08
Implemented on:	1997-10-01
ICS Classification:	75.060-Natural gas
Chinese Classification:	E20-Petroleum and natural gas in general
Professional Classification:	GB-National Standard
Related Keywords:	natural gas natural gas-determination mercury-atomic absorption spectrometry scopethis standard flameless atomic absorption spectroscopy natural
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《GB/T 16781.1-1997天然气中汞含量的测定原子吸收光谱法》由TC244（全国天然气标准化技术委员会）归口，主管部门为国家标准化管理委员会。

Scope

This standard specifies A and B methods for the determination of mercury in natural gas (including elemental mercury, dimethylmercury and diethylmercury). Method A specifies sampling at atmospheric pressure, absorption of mercury by potassium permanganate solution, subsequent reduction of mercury ions, and analysis by flameless atomic absorption spectroscopy. Sampling for 2h, the detection limit is 0.05μg/m3. Aromatics can interfere. If aromatics are present, method B is recommended. Method B specifies sampling at atmospheric pressure or higher, adsorption of mercury by silver/gold, subsequent desorption, and analysis by flameless atomic absorption spectroscopy. Sampling under the minimum pressure of 3MPa for 2h, the detection limit is 3×10^-4μg/m³. Method A is used for the determination of natural gas with high mercury content (>0.5μg/m³), method B is used for the determination of natural gas with low mercury concentration (10^-3～1μg/m³ ) determination.

More samples: GB 18306-2015 GB 50021-2001(2009) DL/T 5154-2012

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