GB/T 39306-2020 in English

VALID

Reclaimed water quality—Determination of total arsenic—Atomic fluorescence spectrometry

Issued on:2020-11-19
Implemented on:2021-10-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $90.00
$88.00

Standard No:	GB/T 39306-2020
Document status:	VALID
Title in English:	Reclaimed water quality—Determination of total arsenic—Atomic fluorescence spectrometry
Title in Chinese:	再生水水质总砷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:	2020-11-19
Implemented on:	2021-10-01
ICS Classification:	13.060.50-Examination of water for chemical substances
Chinese Classification:	G76-Basic standards and general methods for water treatment agent
Professional Classification:	GB-National Standard
Related Keywords:	total arsenic atomic fluorescence spectrometry introduction interpretation reclaimed water quality determination total arsenic content reclaimed water reclaimed water plant
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《GB/T 39306-2020再生水水质总砷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，TC63SC5（全国化学标准化技术委员会水处理剂分会）执行，主管部门为中国石油和化学工业联合会。

Introduction

Interpretation of the core content of the standard

This standard uses an atomic fluorescence spectrometer to determine the total arsenic content in the range of 0.1-50 μg/L in reclaimed water, and achieves trace detection through the principle of acid digestion-hydride generation. Key technical features include:

Technical parameters	Requirements	Description
Detection limit	0.1 μg/L	Meet strict recycled water standards
Linear range	0-20 μg/L	6-point calibration curve
Precision	≤10% RSD	Tolerance for parallel samples
Digestion method	Nitric acid micro-boiling digestion	Ensure arsenic form conversion

Key technical points

1. Pretreatment process

The sample needs to undergo three steps of hydrochloric acid acidification and preservation → nitric acid digestion → thiourea-ascorbic acid reduction to ensure that pentavalent arsenic is converted into a detectable trivalent arsenic form.

2. Instrument operation specifications

Note when using arsenic hollow cathode lamp:

Lamp current optimization: usually 30-60 mA
Carrier gas flow rate: 400-600 mL/min
Atomizer height: 8-10 mm

Standard implementation recommendations

1. Quality control measures

Each batch of samples should contain:

Blank sample (hydrochloric acid solution)
Quality control sample (4 μg/L standard solution)
Spike recovery sample (spike amount 10 μg/L)

2. Industry application cases

A reclaimed water plant in an industrial park used this standard to monitor the arsenic content in the effluent and found that when the raw water contained 2.3 μg/L arsenic, it was reduced to 0.15 μg/L after reverse osmosis treatment, verifying the effectiveness of the process.

Standard Evolution Analysis

Compared with traditional spectrophotometry, this standard has the following advantages:

10-fold sensitivity improvement
Enhanced anti-interference ability
Analysis time shortened to 15 minutes/sample

More samples: NB/T 47013.2-2015 DL/T 5154-2012 JC/T 2453-2018

Sample only — not a preview of GB/T 39306-2020

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