Product Type: Nutrient Standards

Product 56

Sophy Gasson — Mon, 19 Nov 2007 11:50:00 GMT

Low Nutrient Seawater
Intro: Low Nutrient Seawater (LNS) can be used for the preparation of fresh standards and as a refractive-index blank.

Seawater matrix salts affect the kinetics and colour intensities of the colorimetric methods widely used in the determination of dissolved nutrients (nitrate, nitrite, phosphate, silicate and ammonia). In order to eliminate these salt effects, it is essential that working calibration solutions are prepared in a seawater matrix. Low Nutrient Seawater (LNS) can be used for the preparation of fresh standards and as a refractive-index blank. For lower accuracy work, LNS may also be used to define the zero-concentration calibration points.

Low Nutrient Seawater has defined maxima for the nutrients, phosphate, silicate, nitrate, nitrite and ammonia. Owing to atmospheric effects, the ammonia concentration, although low at the time of bottling, cannot be guaranteed.

LNS is available in packs of 10 x 1 Litre bottles.

Data Sheet: OSILSEAWATERBROCHURE

Product 58

Sophy Gasson — Mon, 19 Nov 2007 12:04:00 GMT

Nutrient Standard Solutions
Intro: Concentrated solutions of phosphate, nitrite, nitrate, silicate and ammonia are available for the preparation of working standards.

Concentrated solutions of phosphate, nitrite, nitrate, silicate and ammonia are available for the preparation of standards.

Nutrient Standard Solutions should be diluted with Low Nutrient Seawater to prepare working standards for the measurement of nutrients in seawater samples, in order to eliminate salt effects.

NSS Concentrations

Nutrient	Concentration	Product Code
Phosphate	100 µM	NSSPO
Nitrite	100 µM	NSSNI
Nitrate	1000 µM	NSSNA
Silicate	1000 µM	NSSSI
Ammonia	10 mM	NSSAM

Data Sheet: OSILSEAWATERBROCHURE

Product 57

Sophy Gasson — Mon, 19 Nov 2007 11:55:00 GMT

Marine Nutrient Standards Kit
Intro: Calibration of analytical systems for nutrients in seawater requires standards to be prepared in seawater.

Calibration of analytical systems for nutrients in seawater requires standards to be prepared in seawater.

This kit contains concentrates of Nutrient Standard Solutions (50ml each of phosphate, nitrite, nitrate, silicate, ammonia) and Low Nutrient Seawater (2 x 1 Litre) for the preparation of fresh standards.

Each kit contains full instructions.

Data Sheet: OSILSEAWATERBROCHURE

Product 54

Sophy Gasson — Mon, 19 Nov 2007 11:41:00 GMT

Freshwater Nutrient Standards Kit
Intro: For the preparation of non-marine working standards, this kit contains concentrates of Nutrient Standard Solutions and de-ionised water for the preparation of fresh standards.

For the preparation of non-marine working standards, this kit contains concentrates of Nutrient Standard Solutions (50ml each of phosphate, nitrite, nitrate, silicate, ammonia) and de-ionised water (2 x 1 Litre) for the preparation of fresh standards.

Each kit contains full instructions.

Data Sheet: OSILSEAWATERBROCHURE