GB/T 14591-2016 in English
VALIDWater treatment chemicals--Poly ferric sulfate
- Issued on:2016-12-13
- Implemented on:2017-07-01
- File Format:PDF
- Delivery:Via email within 5 business days
$301.00
《GB/T 14591-2016水处理剂 聚合硫酸铁》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
Core changes in the standard revision
| Revision dimensions | 2006 edition | 2016 edition |
|---|---|---|
| Nature of the standard | Mandatory | Recommended |
| Product classification | Class Ⅰ/Ⅱ | First-class product/qualified product |
| Detection method | Arsenic spot method, etc. | Newly added atomic fluorescence spectrometry |
Key indicator requirements
When using atomic absorption spectrometer to measure heavy metals, special attention should be paid to the following:
- The lead and cadmium detection adopts the extraction-flame method, and the detection limit reaches 0.00005%
- The total iron index of solid products is increased from ≥19.0% to ≥19.5%
- New zinc and nickel indexes (≤0.01%)
Innovation in detection methods
Advantages of atomic fluorescence method: The sensitivity of mercury detection reaches 0.00001%, which is 2 orders of magnitude higher than that of traditional spectrophotometry. When using the potassium borohydride-sodium hydroxide reduction system, the pH needs to be controlled within the range of 1.8-2.6.
Special requirements for drinking water treatment
- Raw materials must be ferrous sulfate (Class I) + industrial sulfuric acid
- Arsenic content must be strictly controlled ≤0.0001% (first-class product)
- Must comply with the "Sanitary Safety Evaluation Specification for Chemical Treatment Agents for Drinking Water"
Implementation suggestions
Enterprise upgrades should focus on:
- Establish an atomic fluorescence detection laboratory
- Raw material procurement increases heavy metal traceability requirements
- Solid product packaging must comply with GB/T 8946 moisture-proof standards
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