Valid

NY/T 1121.10-2006Soil Testing. Part 10: Method for determination of soil total hydrargyrum (English PDF)

土壤检测第10部分：土壤总汞的测定

Preview PDF

This is a limited preview

Buy now to download the full PDF (8 pages)

Need quotation for your management?

Get a formal quotation for NY/T 1121.10-2006 in 30 minutes.

Issued by

Ministry of Agriculture of the People's Republic of China

Level / Type

National · Recommended

Issue date

July 10, 2006

Implementation date

October 1, 2006

Scope

NY/T 1121.10-2006 is the English-translated version of 土壤检测第10部分：土壤总汞的测定.

NY/T 1121.10-2006 is the Chinese standard "Soil Testing. Part 10: Method for determination of soil total hydrargyrum". Its scope clause reads: This part is applicable to the determination of trace hydrargyrum in soils.

The minimum detectable amount for this part is 0.04 ng hydrargyrum. If weighing 0.5 g sample for measurement, the minimum detection limit is 0.002 mg/kg, AND the measurement upper limit can reach to 0.4 mg/kg.

Its clauses include scope of application; method summary; instruments and equipment. It was issued by the Ministry of Agriculture of the People's Republic of China on 2006-07-10 and took effect on 2006-10-01.

Found what you need?

Document preview — NY/T 1121.10-2006

National Standard of the People's Republic of China

ICS: 13.080.05
Classification: B 11

Issued by: Ministry of Agriculture of the People's Republic of China

Foreword...3
1 Scope of application...5
2 Method summary...5
3 Instruments and equipment...5
4 Reagents and solutions...6
5 Analysis steps...7
6 Results calculation...8
7 Precision...8
8 Notes...8

Foreword

NY/T 1121 Soil testing is a standard series, which include the following parts.

- Part 1.Soil sampling, processing, and reposition;

- Part 2.Method for determination of soil pH;

- Part 3.Method for determination of soil mechanical composition;

- Part 4.Method for determination of soil bulk density;

- Part 5.Method for determination of soil cation exchange capacity in

calcareous soil;

- Part 6.Method for determination of soil organic matter;

- Part 7.Method for determination of available phosphorous in acid soil;

- Part 8.Method for determination of soil available boron;

- Part 9.Method for determination of soil available molybdenum;

- Part 10.Method for determination of soil total hydrargyrum;

- Part 11.Method for determination of soil total arsenic;

- Part 12.Method for determination of soil total chrome;

- Part 13.Method for determination of soil exchangeable calcium and

magnesium;

- Part 14.Method for determination of soil available sulphur;

- Part 15.Method for determination of soil available silicon;

- Part 16.Method for determination of total water-soluble salt;

- Part 17.Method for determination of soil chloride ion content;

- Part 18.Method for determination of soil sulphate content;

...

This part is part 10 of NY/T 1121.

This part was proposed by AND shall be under the jurisdiction of Ministry of

Agriculture of the People's Republic of China.

Soil testing -

Part 10.Method for determination of soil total hydrargyrum

1 Scope of application

This part is applicable to the determination of trace hydrargyrum in soils.

The minimum detectable amount for this part is 0.04 ng hydrargyrum. If

weighing 0.5 g sample for measurement, the minimum detection limit is 0.002

mg/kg, AND the measurement upper limit can reach to 0.4 mg/kg.

2 Method summary

Ground-state hydrargyrum atoms are excited by ultraviolet light at a wavelength

of 235.7 nm to produce resonance fluorescence. The fluorescence

concentration is directly proportional to the concentration of hydrargyrum under

certain measurement conditions and in the lower concentration range.

As for the sample, USE the nitric acid-hydrochloric acid mixed reagent to make

it dissolve in a boiling water bath, to make all the hydrargyrum contained

dissolve into solution in the form of divalent hydrargyrum, then USE the

potassium borohydride to reduce the divalent hydrargyrum to elemental

hydrargyrum AND form hydrargyrum vapour, which is led by the carrier gas into

the fluorescence pool of the instrument, in order to measure the fluorescence

peak AND obtain the hydrargyrum content in sample.

3 Instruments and equipment

3.1 Atomic fluorescence spectrometer

3.2 Argon or high purity nitrogen cylinders

stable [HgCl]2- complex ion, which can inhibit the adsorption and volatile

of hydrargyrum. However, it shall avoid using the boiled aqua regia to

process the sample, in order to prevent the loss of hydrargyrum in the

form of chloride volatilization. When the sample contains a large amount

of organic substances, it may appropriately increase the concentration

and dosage of nitric acid - hydrochloric acid mixed reagent.

3) Due to environmental factors and the limit of instrument stability, during

the measurement of each batch of samples, DRAW calibration curve. If

the sample contains too much hydrargyrum, it shall not conduct

measurement directly BUT appropriately reduce the weighed sample, in

order to make the hydrargyrum content in the sample be within the straight

line range of the calibration curve.

4) After sample digestion is completed, usually ADD the preservation

solution and dilution in order to avoid hydrargyrum loss. However,

samples shall be measured as early as possible, AND under normal

circumstances, it is only allowed to be preserved for 2d ~ 3d.

5) The hydrargyrum atoms at excited state and certain atoms or compounds

(such as oxygen, nitrogen and carbon dioxide, etc.) collide, causing

energy transfer and generating fluorescence quenching; therefore, USE

the inert gas argon or high purity nitrogen as carrier gas into the

fluorescent pool, to improve the sensitivity and stability of the test. During

operation, it shall pay attention to avoid air or water vapor into the

fluorescent pool.

......

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 8 pages — is available in the English PDF.

How to Download NY/T 1121.10-2006

1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.