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How accurate is a TOC analyzer?

Article Source：Hengmei Water Quality Analysis Instrument Network   Release time:2025-07-23 16:00:17

In the quality control of pharmaceutical, electronic and laboratory water, the accuracy of the total organic carbon (TOC) analyzer is directly related to product quality. The TOC analyzer uses conductivity difference detection technology, with an accuracy of ±4% and a resolution of 0.001 mg/L. This article will deeply analyze the accuracy performance, key influencing factors and verification methods of the TOC analyzer to help users fully understand the performance characteristics of this important detection instrument.

1. Core accuracy indicators of TOC analyzer

The accuracy of TOC analyzer is mainly reflected by the following key parameters:

Measurement range and accuracy: ±4% accuracy in the range of 0.001-1.600mg/L, meeting the stringent requirements of pharmaceutical water (USP<643> and EP2.2.44)

Resolution: 0.001mg/L high resolution, can detect trace organic pollution in ultrapure water

Repeatability error: ≤3% repeatability ensures stable and reliable test results

Response time: Single test completed within 4 minutes, achieving rapid quality monitoring

It is particularly noteworthy that the instrument meets the requirements of the 2020 edition of the "Chinese Pharmacopoeia" and can provide complete IQ/OQ/PQ validation services to ensure the compliance of test data.

2. Key factors and solutions affecting accuracy

In actual use, the accuracy of the TOC analyzer may be affected by many factors:

Sample temperature: 1-70℃ samples are allowed to be tested, but it is recommended to control it at 25±2℃ for optimal accuracy

System calibration: Two-point calibration method (zero point and standard solution) is used for regular verification

Operation specifications:

Avoid bubble interference

Regularly replace membrane components

Keep the injection system clean

Environmental control: Reduce laboratory organic vapor contamination (such as alcohol, detergents)

The built-in automatic alarm function of the instrument can provide timely reminders when the sample exceeds the standard, effectively avoiding the generation of erroneous data.

The TOC analyzer, with its conductivity difference detection technology and intelligent design, can provide high-precision detection results of ±4%, which fully meets the detection needs of pharmaceutical water and ultrapure water. Through standardized verification and maintenance, users can obtain reliable TOC data for a long time.


Article address:http://www.hmwatertesting.cn/article1/51.html

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