Vietnam: What are the details of National Standard TCVN 6971: 2001 on synthetic detergent for kitchen?
- What are the scope of application and reference documents of National Standard TCVN 6971: 2001 on synthetic detergent for kitchen in Vietnam?
- What are the regulations on packaging, labeling, transporting, and storing synthetic detergent for kitchen in Vietnam?
- What are the regulations on determining the content of arsenic and heavy metals in synthetic detergent for kitchen in Vietnam?
What are the scope of application and reference documents of National Standard TCVN 6971: 2001 on synthetic detergent for kitchen in Vietnam?
In Section 1.2 of National Standard TCVN 6971: 2001 on synthetic detergent for kitchen, the scope of application and reference documents of National Standard TCVN 6971: 2001 on synthetic detergent for kitchen in Vietnam are specified as follows:
Scope of application
This National Standard applies to synthetic washes used to wash vegetables, fruits and utensils for eating in the kitchen, using biodegradable surfactants and some other additives that are approved by the Ministry of Health for use in food.
Reference documents
TCVN 1056 - 86, Reagents - Preparation of solutions for colorimetric and nephelometric analysis.
TCVN 3778 - 82, Reagents - Method for the determination of asenic content
TCVN 4851 - 89 (ISO 3696 - 1987), Water for analytical laboratory use Specification and test method
TCVN 5454 - 1999 (ISO 607 - 1980), Surface active agent and detergents – Methods of sample divíion.
TCVN 5456 - 91, Synthetical detergent - Method for the determination of ph
TCVN 5491 - 91 (ISO 8212 - 1986), Soaps and detergents - Techniques of sampling during manufacture
TCVN 6969: 2001, Testing method for biodegradability of synthetic detergent.
What are the regulations on packaging, labeling, transporting, and storing synthetic detergent for kitchen in Vietnam?
Pursuant to Section 6 of National Standard TCVN 6971: 2001 on synthetic detergent for kitchen, packaging, labeling, transporting, and storing synthetic detergent for kitchen in Vietnam are specified as follows:
(1) Packaging
Detergents for the kitchen are packaged in plastic bottles.
Kitchen detergent bottles are stacked in cardboard containers, ensuring certainty and safety during transportation and storage. Packaging quantity shall comply with the agreement between producers and consumers.
(2) Labeling
On each bottle of kitchen detergent, there is a label that says:
– Name of goods;
– Name and address of the production facility;
– Main raw material components;
– Main quality indicators;
– Instructions for use;
– Date of manufacture;
– Expiry date;
On each cardboard box, there is a label that reads:
– Name of goods;
– Name and address of the production facility;
– Number of bottles;
– Storage instructions (symbol to cover rain and sun);
– Date of manufacture.
(3) Transportation and storage
Detergents for kitchen are transported by common vehicles but must not be stacked too high to avoid causing breakage, or squashing the product packaging and must be covered from rain and sun.
Detergents for kitchen are stored in cool, dry storage.
What are the regulations on determining the content of arsenic and heavy metals in synthetic detergent for kitchen in Vietnam?
In subsection 4.5 Section 4 of National Standard TCVN 6971: 2001 on synthetic detergent for kitchen, the determination of the content of arsenic and heavy metals in synthetic detergent for kitchen in Vietnam is specified as follows:
- Preparation of solution for testing
Weigh approximately 10 g of the sample (accurate to 0.01 g) into a heat-resistant triangle jar with a capacity of 250 ml. Add 10 ml of concentrated sulfuric acid and heat lightly on an electric stove, then gradually increase the temperature so that the sample burns into a black-brown solution. Let cool the solution and add gradually drop by drop about 5 ml of concentrated nitric acid and continue to boil slightly until the solution becomes transparent.
Cool the solution and rinse the walls of a jar with about 20 ml of distilled water, add 5 ml of acetic acid solution, and boil the solution again. The solution in a transparent, colorless jar is achieved. Let cool transfer the solution to a rated jar with a capacity of 100 ml, add water to the level mark, and shake thoroughly. This solution is used to determine arsenic and heavy metals.
- Determination of heavy metal content, in lead
+ Principles
Heavy metal ions formed with sodium sulfide solution precipitate black or brown in an acetic acid environment pH = 3.5 - 4. Compare the color of the sample solution with the color of the lead standard solution.
+ Chemicals and reagents
++ sulfuric acid, d = 1.84;
++ nitric acid, d = 14.3
++ acetic acid, 30 % solution and (1 + 15);
++ sodium sulfide, 2% solution;
++ ammonia, 25 % solution, and (1 + 2);
++ Standard lead solution A, 1 mg/ml, prepared according to TCVN1056-86;
++ Standard lead solution B, 0.010 mg/ml, take 10 ml of solution A and put it in a 1000 ml rated jar, norm to the mark with water and shake thoroughly;
++ Standard lead solution C, 0.0001 mg/ml, take 10 ml of solution B and put it in a 1000 ml rated jar, norm to the mark with water and shake thoroughly.
Solutions B and C are mixed only before administration.
+ Tools
++ Nessler color tube 50 ml;
++ Rated capacity bottles 100 ml, 1000 ml.
+ How to proceed
Suction 10 ml of sample in clause 4.5.1 into the Nessler color manifold. At the same time take 20 ml of standard lead C solution into another color matching tube. Neutralize sample and standard solutions with ammonia solution (1 + 2) according to phenolphthalein directive to pink seal.
Add to each test tube 1 ml of acetic acid and 0.5 ml of sodium sulfide solution. Cover the button and shake well. After 1 minute of comparing the color of the test tube, the solution for testing should not be darker than the solution of the comparison tube. When comparing colors must look from top to bottom, on a white background.
+ Determination of arsenic content
Take 10 ml of solution in clause 4.5.1 and determine arsenic according to TCVN 3778 - 82.
Compare the paper color of the sample with the paper color of a standard solution with 0.001 mg As.
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