HJ 609-2019 in English
VALIDTechnical specifications and test procedures for water quality on-line automatic monitoring equipment of chromium(Ⅵ)
- Issued on:2019-12-24
- Implemented on:2020-03-24
- File Format:PDF
- Delivery:Via email within 1~3 business days
$253.00
本标准规定了六价铬水质自动在线监测仪的技术要求、性能指标及检测方法。
本标准适用于六价铬水质自动在线监测仪的生产设计、应用选型和性能检测。
六价铬水质自动在线监测仪（以下简称“仪器”）的量程范围应包含：0.010 mg/L～2.00mg/L，主要应用于地表水、生活污水和工业废水等的监测。
Introduction
Background of Standard Revision and Technological Evolution
As the replacement standard for HJ 609-2011, HJ 609-2019 mainly upgrades the technical requirements for hexavalent chromium water quality automatic online monitoring instrument.
- Strengthening of environmental protection regulations: Responding to the new requirements for heavy metal monitoring in the Environmental Protection Law and the Water Pollution Prevention and Control Law
- Improvement of technical defects: Addressing the deficiencies of the 2011 version of the standard in terms of on-site applicability and data validity
- Changes in monitoring needs: Adapting to the stricter chromium pollution control needs in surface water/industrial wastewater monitoring
Comparison of core performance indicators
| Indicator dimension | HJ 609-2011 | HJ 609-2019 | Technical improvement |
|---|---|---|---|
| Detection range | Undefined lower limit | 0.010-2.00 mg/L | Lower limit of quantification to 0.01mg/L |
| Field applicability | Not specified | Added 6 indicators such as ion interference/temperature stability | Improved adaptability to complex environments |
| Data identification | Unclassified | 4 types of identification such as maintenance (M)/fault (D) | Strengthen data traceability |
Analysis of key technical requirements
4.1 Instrument composition architecture
The standard requires that the hexavalent chromium online monitor must include four core units:
- Sampling/metering unit: using corrosion-resistant materials such as polytetrafluoroethylene, sampling error ≤±1%
- Reagent storage unit: the reagent storage capacity must support ≥168 tests (7 days)
- Analysis unit: reaction module temperature control accuracy ±0.5℃, detection module signal-to-noise ratio ≥100:1
- Control unit: data storage ≥12 months, with three-level authority management
5.5 Key detection methods
Case: Comparison detection of actual water samples
The water sample from the discharge outlet of an electroplating plant (Cr6+ concentration 0.15mg/L) was selected and the following were used:
- Standard method (HJ 908) measurement value: 0.147±0.003mg/L
- class=instrument>Online monitoring instrumentAverage of 15 measurements: 0.142mg/L
Relative error 3.4% (＜10% limit), in line with standard requirements
Implementation suggestions
Key points for equipment selection
- Give priority to equipment that has passed CMA certification and meets IP52 protection level
- Check the actual measurement report of the instrument's memory effect index (≤±10%)
- Confirm that it has the HJ 212 protocol docking capability
Operation and maintenance management requirements
- Compare actual water samples every month (at least 3 concentration points)
- Test the ambient temperature stability (5-40℃ range) every quarter
- Establish a data identification system (M/D/C/SC classification records)
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
HJ 53-2000 in English
Interim regulation for acceptable levels of residual radionuclides in soil of site considered for release
2000-05-22 -
HJ/T 2.4-1995 in English
Technical guidelines for noise impact assessment
1995-11-28 -
HJ 2010-2011 in English
Technical specification for wastewater treatment by membrane biological process
2011-10-24 -
HJ/T 288-2006 in English
Specifications for environmental protection product -- Wet flue-gas desulphurization & precipitator device
2006-07-28
