GB/T 1600 Karl Fischer Method Automatic Pesticide Moisture Meter Power 220V 50HZ

STNY-102 Automatic Pesticide Moisture Meter

The STNY-102 automatic pesticide moisture meter is designed and manufactured according to the GB/T 1600 pesticide moisture determination method. The detection principle is based on electrochemical reactions and adopts the standard test method of Karl Fischer volumetric titration for water determination. It fully automatically determines the moisture content of pesticides and can quickly and accurately measure the moisture content from 10ppm to 100%

Detection principle

The detection principle is based on electrochemical reactions, specifically, moisture determination is carried out through the following steps:

Preprocessing: When the Karl Fischer reagent in the electrolytic cell of the instrument reaches equilibrium, inject the sample containing water into it.

Reaction process: Water participates in the oxidation-reduction reaction of iodine and sulfur dioxide, forming pyridine and methyl sulfate pyridine, and consuming iodine. In this process, iodine is electrolyzed and reacts with water. The consumed iodine is electrolyzed at the anode to maintain the progress of the redox reaction.

Endpoint determination: When the reaction consumes all the water, the remaining Karl Fischer reagent will form a conductive liquid between the platinum electrodes, and the titration endpoint can be determined by measuring the conductivity. If there is a slight change in the conductivity of the solution before and after adding the sample to be tested, this information can also be used to calculate the moisture content in the sample.

Functional Features

Titration system: high-precision titration system, with a minimum nightfall of 1 μ l

Electromagnetic valve: Imported advanced integrated electromagnetic three-way valve reduces the dead volume inside the valve body to the minimum, and the liquid circuit switching speed only takes one hundredth of a second. The outlet pressure of the electromagnetic three-way valve reaches 100kPa, so there is no need to worry about leakage of the three-way valve even if the pipeline is blocked.

● Current variation: Real time display of reaction cup current variation, allowing for intuitive observation of the entire reaction process and more accurate measurement of the sample

● Storage information: Measurement information that complies with GLP standards and can store 200 measurement results

Printing function: It can connect to a micro printer and print stored measurement information;

● Waste discharge function: Automated solvent and waste liquid suction and discharge function

● Display parameters: including date, operator number, burette type, endpoint current, etc

● Special air pump: Designed with a dedicated solvent suction pump, it eliminates the siphon phenomenon caused by air pressure, and stops immediately upon pressing, accurately controlling the volume of solvent

Technical parameter

Shandong Shengtai Instrument Co., Ltd. provides the following quality assurance for the instruments sold to you:

----The provided instrument materials are brand new, meet national quality standards, and have a manufacturer's certificate of conformity;

----The materials and main components provided meet the technical requirements specified in the technical documentation;

----The overall quality assurance period of the equipment is one year (excluding normal wear and tear of vulnerable parts).

----We are responsible for free maintenance of any instrument quality issues that occur during the warranty period. Due to equipment malfunction caused by the user's responsibility, we are responsible for repairing and charging reasonable fees.

----Lifetime discounted supply of parts for equipment, and lifetime maintenance and repair of the entire machine.

----After the expiration of the warranty period, if the user needs maintenance and technical services, we will only charge a cost fee.

Packing list