HJ 974-2018 in English

VALID

Soil and sediment - Determination of 11 elements - Alkaline fusion and inductively coupled plasma optical emission

Issued on:2018-11-13
Implemented on:2019-03-01
File Format:PDF
Delivery:Via email within 5 business days

Price(USD)： $420.00
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Standard No:	HJ 974-2018
Document status:	VALID
Title in English:	Soil and sediment - Determination of 11 elements - Alkaline fusion and inductively coupled plasma optical emission
Title in Chinese:	土壤和沉积物 11种元素的测定碱熔-电感耦合等离子体发射光谱法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 5 business days
Issued on:	2018-11-13
Implemented on:	2019-03-01
Professional Classification:	HJ-Environment
Related Keywords:	plasma optical emission spectrometry plasma optical emission introduction interpretation alkaline flux alkaline fusion alkaline melting
Related Topics:	Inductance and Emission Spectra emission spectrometry inductive coupling inductively coupled plasma optical emission spectrometry inductive coupling Inductively Coupled Plasma Plasma emission spectrum Determination of Sodium, Calcium, Zinc and Phosphorus Ashing Alkali Fusion-Inductively Coupled Plasma Emission Spectrometry Soil Manganese Inductive coupling+ Emission spectrum of iron element Inductive coupling standard Determination of Seven Trace Elements in Water by Inductively Coupled Plasma-Atomic Emission Spectrometry spectrum of each object Each object spectrum Inductively Coupled Plasma Emission Spectroscopy plasma emission 23 metal elements in soil and sediment Plasma spectroscopic elemental analysis plasma emission spectrometry 12 metal elements in soil and sediment manganese in soil Element interference 22 types of soil and sediment Inductively Coupled Plasma Emission Element interference coupled plasma Cesium emission spectrum Spectrometer deposits soil and sedimentpressurizedfluid soil and sediment soil sediment Soil Beryllium Inductive Coupling Inorganic elements in soil and sediment plasma emission spectrometry soil sediment Soil Alkali Fusion Soil and Sediment Titanium Soil Manganese inductively coupled plasma optical emission spectrometry Soil and Sediment Inductive Coupling Soil element inductive coupling Determination of 24 Elements in Soil by Inductively Coupled Plasma Mass Spectrometry hj 972 2018 Soil Determination Inductively Coupled Plasma Mass Spectrometry Soil Emission Spectroscopy various elements in the soil species element HJ974 soil, sediment Determination of 11 Elements in Soil and Sediment Alkali Fusion-Inductively Coupled Plasma Emission Spectroscopy HJ 974-2018 Soil and sediment determination methods dl/t 974-2018

本标准规定了测定土壤和沉积物中锰、钡、钒、锶、钛、钙、镁、铁、铝、钾和硅等11种元素的碱熔-电感耦合等离子体发射光谱法。

Introduction

Interpretation of the core content of the standard

Element group	Detection limit (g/kg)	Lower limit of determination (g/kg)	Oxide form
Mn/Ba/V/Sr/Ti	0.01-0.02	0.04-0.08	-
Ca/Mg/Fe/Al/K/Si	0.01%-0.07%	0.04%-0.28%	Calculated in oxides

Method principle and technological evolution

After the sample and alkaline flux were melted at 1000℃, the following were determined by inductively coupled plasma optical emission spectrometry (ICP-OES):

Alkaline melting decomposes the silicate matrix

Acid dissolution forms a homogeneous solution

Characteristic spectral lines excited by elements in the plasma torch

Compared with the traditional acid hydrolysis method, this method significantly improves the recovery rate of the insoluble elements.

Key Operation Points

Sample Pretreatment

Steps Parameters Precautions

Flux Ratio Na₂CO₃:Li₂B₄O₇:LiBO₂=10:1:4 Add in layers to ensure complete melting

Melting Temperature 1000℃±20℃ Platinum crucible needs to be pre-padded with flux

Acid Dissolution HNO₃:HCl=1:4 Mixed Acid Operate in a Fume Hood

Interference Elimination Strategy

Spectral Interference

Background Subtraction: Automatic Background Correction Technology

Interference Coefficient Method: K=(DP)/P₁ Formula Calculation

Non-spectral Interference

Matrix Matching Method: Prepare Standard Solutions with Similar Matrices

Internal Standard Correction: Rh(343.489nm) is Recommended

Implementation Recommendations

Quality Control Requirements

Items Frequency Acceptance Criteria

Blank test Every 10 samples ＜Determination limit

Parallel samples Every 20 samples RSD≤35%

Standard material Every 20 samples |lgC-lgCₛ|≤0.15

Safety Precautions

The experiment involves strongly corrosive reagents (HNO₃/HCl) and high temperature equipment, so it is necessary to:

Operate in a fume hood

Wear a protective mask and acid-resistant gloves

Use special tools to take and place the platinum crucible

More samples: DL/T 368-2010 NB/T 47013.2-2015 JGJ 94-2008

Sample only — not a preview of HJ 974-2018

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Steps	Parameters	Precautions
Flux Ratio	Na₂CO₃:Li₂B₄O₇:LiBO₂=10:1:4	Add in layers to ensure complete melting
Melting Temperature	1000℃±20℃	Platinum crucible needs to be pre-padded with flux
Acid Dissolution	HNO₃:HCl=1:4 Mixed Acid	Operate in a Fume Hood

Items	Frequency	Acceptance Criteria
Blank test	Every 10 samples	＜Determination limit
Parallel samples	Every 20 samples	RSD≤35%
Standard material	Every 20 samples	\|lgC-lgCₛ\|≤0.15