Reagent for purified water detection | Reagents and test solutions

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Reagent for purified water detection View Certificate

This product can be used as a working standard for daily analysis and testing; It can also be used for laboratory quality control such as test method evaluation and instrument calibration.

1、Traceability and value determination method

The standard value is verified by . The traceability of the product quantity value is ensured through the use of production, measurement methods and measuring instruments that meet the requirements of metrological characteristics.

2、Characteristic value and expanded uncertainty

No	Analyte	CAS	Standard value	Uncertainty(k=2)	Matrix
1	Methyl red indicator	493-52-7	0.05%(w/v)	/	Water
2	Bromothymol blue indicator	76-59-5	0.05%(w/v)	/
3	Potassium chloride solution	7447-40-7	10%(w/v)	/
4	Diphenylamine sulfuric acid test solution-A	122-39-4	0.1g	/
5	Diphenylamine sulfuric acid test solution-B	7664-93-9	100mL	/
6	Standard substance for nitrate composition analysis in water	7757-79-1	100μg/mL	3%
7	Nitrate free water	7732-18-5	/	/
8	Dilute hydrochloric acid solution of para aminobenzenesulfonamide	63-74-1	1%(w/v)	/
9	Naphthalene ethylenediamine hydrochloride solution-A	1465-25-4	0.1g	/
10	Naphthalene ethylenediamine hydrochloride solution-B	7732-18-5	/	/
11	Standard substance for analysis of nitrite content in water	7632-00-0	100μg/mL	3%
12	Nitrite free saline	7732-18-5	/	/
13	Ammonium chloride solution standard substance	12125-02-9	31.5μg/mL	/
14	Alkaline potassium mercuric iodide	/	/	/
15	Without ammonia	7732-18-5	/	/
16	Dilute sulfuric acid solution	7664-93-9	9.8%-10.0%	/
17	Standard substance for potassium permanganate titration solution	7722-64-7	c(KMnO₄)=0.02012mol/L	0.2%
18	Acetate buffer	/	pH=3.5	/
19	Thioacetamide test solution-A	62-55-5	40g/L	/
20	Thioacetamide test solution-B	/	/	/
21	Lead standard solution	7439-92-1	10μg/mL	/

3、Uniformity test and stability investigation

According to ISO 33405 metrology technical specification, the samples are randomly sampled after packaging, and the uniformity test and long-term stability tracking of the product are carried out by . The results show that the uniformity meets the F test rules and has good stability.

The quantitative value of this product is valid for 12 months from the date of value determination. The research and development unit will continue to track and monitor the stability of the product. If the value changes during the validity period, the user will be notified in time.

4、Packaging storage and use

Packaging: This product is packaged in Plastic/Brown glass bottle, with the specification of 6 sets/box（21 bottles）. It should be protected from breaking when carried or transported.

Storage: Room temperature and in the sealed and light-proof conditions. Before use, it should be （20±3）℃℃ fully shaken to ensure homogeneity. This product should be used as soon as possible after being opened. During the use process, strict precautions should be taken to prevent contamination.

Form	Liquid State
Stroma	Water
Packing	Plastic/Brown glass bottle
Save conditions	Refrigeration(4±4）℃ Store airtight and away from light place.Before use, the temperature should be adjusted to Room temperature，shake uniformity.Used up after opening,prevent contamination during use.