SL/T 466-2020 in English

VALID

Specification for ice sampling and pre-processing in the icebound season

Issued on:2020-11-02
Implemented on:2021-02-02
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $180.00
$175.00

Standard No:	SL/T 466-2020
Document status:	VALID
Title in English:	Specification for ice sampling and pre-processing in the icebound season
Title in Chinese:	冰封期冰体采样与前处理规程
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2020-11-02
Implemented on:	2021-02-02
Superseding:	SL 466-2009 Code of practice regarding the ice sampling techniques and sample preparation methods during the icebound season
Professional Classification:	SL-Water Resources
Related Keywords:	ice sampling ice thickness full ice thickness ice layer ice lifeline
Related Topics:	Frontiers in sample preparation UV sample pretreatment pre-processing ice Pretreatment group Inorganic pretreatment Front sample Blank sample and parallel sample ice combustible ice parallel sample and blank sample Sample handling conditions Inorganic pretreatment Organic pretreatment and inorganic pretreatment Pretreatment experiment Refrigerator Procedures How to deal with solid ultraviolet Trace pretreatment Automatic preprocessing Pretreatment series Inorganic pretreatment room Inorganic experiment pretreatment Sample Peak Front Before injection Pretreatment box long-term ice water how to deal with peak excursion Complex sample preparation Acquisition and Sampling complex sample preparation In vivo sample preparation methods pretreatment inorganic Soil sample pretreatment Sample pretreatment Sample preprocessor sampling ice box in front of Combustible ice and dry Pretreatment box Pretreatment pool Sample pretreatment box ice age mechanism Immersion pretreatment Solid phase sample preparation ice age event ice age event postglacial period front Frozen Hu Grain immersion pretreatment Sample preparation before testing deglaciation Efficient sample preparation pretreatment and deglaciation Sample pretreatment instrument sample place Foreign sample pretreatment Deglaciation last glacial maximum pre-processing and pre- Sample processing Efficient sample preparation algae ice age Front processing pre-processor In vivo sample processing Automatic preprocessing ice age wine pre-extraction g2 sample pretreatment What to do with the baseline Sample preparation and pretreatment Current Gas Sampling Technologies Pretreatment of a large number of samples Sample pretreatment extraction liquid precursor body of ice Sample pretreatment icpoes sample preprocessing icpoes liquid sample pretreatment HPLC sample preparation Liquid sample pretreatment methods sl/t247-2020 Solid sample pretreatment method

本标准适用于冰封期江河湖库冰体痕量半挥发性有污染物及微囊藻毒素样品采集与前处理。

Introduction

Core changes in the standard revision

Revision dimensions	2002 edition	2022 edition
Scope of application	Basic organic pollutants	Newly added triazine pesticides and microcystins
Sampling technology	Single full ice thickness sampling	Stratified sampling (upper/middle/lower layer)
Quality control	Basic QA/QC	Full process quality control system

Analysis of key technical points

1. Layered sampling operation specifications

During sampling, the ice body needs to be divided into three equal parts, and samples from each layer should be obtained using an ice pick or an ice drill. The upper layer (0-1/3 of the ice thickness) mainly reflects atmospheric precipitation, the middle layer (1/3-2/3 of the ice thickness) contains suspended solids in the water, and the lower layer (2/3-full thickness) is enriched with sediment-related pollutants.

2. Key parameters of solid phase extraction

Target type	Recommended adsorbent	Elution solvent	Recovery rate
PAHs	C18 column	Dichloromethane 12mL	85-92%
Organophosphorus pesticides	PS-DVB column	Acetone 8mL	78-86%

Implementation suggestions

Monitoring case of a river basin in Northeast China

The 2023 Songhua River ice period monitoring showed that after stratified sampling, the polychlorinated biphenyl detection concentrations were 0.08ng/L, 0.15ng/L, and 0.32ng/L in the upper, middle, and lower layers, respectively, verifying the vertical distribution differences of pollutants.

Key points for safety protection

Safety thickness of ice layer: The ice thickness in the working area must be ≥25cm
Solvent protection: Dichloromethane operations must be carried out in a fume hood
Emergency preparation: An ice lifeline (≥20m) should be equipped

More samples: DL/T 5154-2012 DL/T 368-2010 GB 50021-2001(2009)

Sample only — not a preview of SL/T 466-2020

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