Our service

Centre Testing International Co., Ltd. (CTI) is the pioneer and leader in the TIC Industry which provides one-stop solutions on testing, inspection, certification, calibration, audit, training & technical services.

 

By Industry

Our service capabilties cover the upstream and downstream of the supply chain including textile and apparel,toys,electronic appliances,medical health,food...andother industries.

Specialty

Comprehensively guarantee quality and safety, promote compliance and innovation, demonstrate brand competitiveness, and achieve higher quality, healthier, safer, and greener sustainable development.

AUTHORITY & TRUST
QUALITY & VALUE
Determination of NPK in Fertilizer

CTI provides testing services for nitrogen, phosphorus, and potassium in various fertilizers to accurately control whether the nitrogen, phosphorus, and potassium content of fertilizers meet the requirements of corresponding products, and adjust soil fertility to adapt to the development of agriculture.

Determination of NPK in Fertilizer

     Service Background

The degree of soil being excavated and utilized is getting higher and higher. Fertilizers can provide plants with one or more essential nutrients. They are important substances to improve soil properties, increase soil fertility, and regulate crop growth. Therefore, fertilizers are needed to supplement these nutrients. Nowadays, the fertilizer market is mixed, product quality varies from good to bad, and fertilizer fraud scandals are common. How to choose fertilizers wisely is of vital importance. It is necessary to accurately understand fertilizer quality problems and strictly control the quality and safety risks of product planting, fertilizer production, circulation, and sales.

     Service Content

Serial Number

Sample Type

Executive standard

Test Items

Detection method

1

Organic fertilizer

NY 525-2012

Mass fraction of total nutrients (nitrogen + phosphorus pentoxide + potassium oxide) (calculated on a drying basis)

N

NY 525-2012

P2O5

NY 525-2012

K2O

NY 525-2012

2

Compound fertilizer

GB/T 15063-2009

Mass fraction of total nutrients (N+P2O5+K2O)

N

GB/T 8572-2010

P2O5

GB/T 8573-2017

K2O

GB/T 8574-2010

3

Blending fertilizer

GB/T 21633-2008

Mass fraction of total nutrients (N+P2O5+K2O)

N

GB/T 8572-2010

P2O5

GB/T 8573-2017

K2O

GB/T 8574-2010

4

Organic-inorganic compound fertilizer

GB/T 18877-2009

Mass fraction of total nutrients (N+P2O5+K2O)

N

GB/T 17767.1-2008

P2O5

GB/T 8573-2017

K2O

GB/T 17767.3-2010

5

Major element water-soluble fertilizer

NY 1107-2010

major element content

N

NY/T 1977-2010

P2O5

NY/T 1977-2010

K2O

NY/T 1977-2010

6

Monoammonium phosphate and diammonium phosphate

GB/T 10205-2009

Mass fraction of total nutrients (N+P2O5)

Mass fraction of total nitrogenN

GB/T 10209.1-2008

Mass fraction of available phosphorusP2O5

GB/T 10209.2-2010

Water-soluble phosphorus as a percentage of available phosphorus

GB/T 10209.2-2010

7

Marsh fertilizer

NY/T 2596-2014

Total nutrient content (N+P2O5+K2O)(calculated on a dry basis)

Total nitrogen

GB/T 17767.1-2008

Total phosphorus P2O5

GB/T 17767.2-2010

Total potassium K2O

GB/T 17767.3-2010

8

Leaf fertilizer containing organic matter

GB/T 17419-2018

Total nutrient content(N+P2O5+K2O)

Total nitrogen

NY/T 1977-2010

P2O5

NY/T 1977-2010

K2O

NY/T 1977-2010

9

Organic matrix for greening

GB/T 33891-2017

Total nutrients (total nitrogen + total phosphorus + total potassium)

Total nitrogenIn N

NY 525-2012

Total phosphorusIn P2O5

NY 525-2012

Total potassiumIn K2O

NY 525-2012

 

     Our Strengths

1.We have professional technical support, testing team and dedicated fertilizer testing laboratory.

2.Our fertilizer testing covers most fertilizer products.

3.Our laboratory obtained CMA qualification.

4.We have rich experience in laboratory data accumulation and cooperation.