GB/T 33086-2016 in English

VALID

Water treatment chemical一Determination of arsenic and mercury- Atomic fluorescence spectrometry

Issued on:2016-10-13
Implemented on:2017-05-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $100.00
$97.00

Standard No:	GB/T 33086-2016
Document status:	VALID
Title in English:	Water treatment chemical一Determination of arsenic and mercury- Atomic fluorescence spectrometry
Title in Chinese:	水处理剂　砷和汞含量的测定　原子荧光光谱法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2016-10-13
Implemented on:	2017-05-01
Chinese Classification:	G76-Basic standards and general methods for water treatment agent
Professional Classification:	GB-National Standard
Related Keywords:	atomic fluorescence spectrometry mercury- atomic fluorescence spectrometry introduction gb/t33086-2016 standard interpretation water treatment chemical一determination arsenic content arsenic standard stock solution
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《GB/T 33086-2016水处理剂　砷和汞含量的测定　原子荧光光谱法》由TC63（全国化学标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。

Introduction

GB/T33086-2016 Standard Interpretation: Determination of Arsenic and Mercury Content in Water Treatment Agents

Test Items	Method Principle	Reagent Requirements	Instrument and Equipment
Determination of Arsenic Content	After the sample is treated with acid digestion, thiourea is used to reduce pentavalent arsenic to trivalent arsenic, and then potassium borohydride is used to reduce arsenic. The fluorescence intensity is detected by atomic fluorescence spectrometer.	Hydrochloric acid, nitric acid, thiourea solution, potassium borohydride-sodium hydroxide solution, etc.	Atomic fluorescence spectrometer is equipped with an arsenic hollow cathode lamp.
Determination of mercury content	After the sample is digested with acid, potassium borohydride is used to reduce mercury to atomic state. The fluorescence of its characteristic wavelength is detected by atomic fluorescence spectrometer.	Nitric acid, hydrochloric acid, potassium borohydride-sodium hydroxide solution, etc.	atomic fluorescence spectrometer is equipped with a mercury hollow cathode lamp.

Standard background and technology evolution analysis

Water treatment agents are widely used in industrial and municipal fields, among which the detection of arsenic and mercury content is crucial. GB/T33086-2016 standard adopts atomic fluorescence spectrometry, which has the advantages of high sensitivity and low detection limit compared with traditional methods.

Reagent preparation and calibration curve

In the determination of arsenic and mercury, the preparation of standard solutions is crucial. For example:

Arsenic standard stock solution: 0.1mg/mL.
Mercury standard stock solution: 0.1mg/mL.
The calibration curve ranges are 0-80μg/L (arsenic) and 0-4.0μg/L (mercury).

The accuracy of the determination results is ensured by calculating the regression equation.

Standard Implementation Advice

Equipment calibration: Calibrate the atomic fluorescence spectrometer regularly to ensure that its sensitivity and accuracy meet the requirements.
Reagent management: Strictly control the purity of reagents, especially the potassium borohydride solution, which should be prepared before use.
Sample treatment: Pay attention to the choice and amount of acid during the digestion process to ensure that the sample is completely dissolved.
Data recording: Record the calibration curve, measurement results and parallel test data in detail for easy traceability.

More samples: DL/T 5154-2012 JJG 21-2008 GB 50021-2001(2009)

Sample only — not a preview of GB/T 33086-2016

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